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Finding the Fourth Proportional to 1,213,627.20, 1,821,938.40 and 764,347.20

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Solution

The fourth proportional to 1,213,627.20, 1,821,938.40 and 764,347.20 is: 1,147,463.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,213,627.20 : 1,821,938.40 = 764,347.20 : x
  2. Step 2: Convert to fraction form
    1,213,627.20/1,821,938.40 = 764,347.20/x
  3. Step 3: Cross multiply
    1,213,627.20x = 1,821,938.40 × 764,347.20
  4. Step 4: Simplify right side
    1,213,627.20x = 1,392,593,514,612.48
  5. Step 5: Solve for x
    x = 1,392,593,514,612.48/1,213,627.20
  6. Step 6: Final answer
    x = 1,147,463.99

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