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Finding the Fourth Proportional to 3,161.78, 4,743.27 and 1,213.84

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Solution

The fourth proportional to 3,161.78, 4,743.27 and 1,213.84 is: 1,820.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,161.78 : 4,743.27 = 1,213.84 : x
  2. Step 2: Convert to fraction form
    3,161.78/4,743.27 = 1,213.84/x
  3. Step 3: Cross multiply
    3,161.78x = 4,743.27 × 1,213.84
  4. Step 4: Simplify right side
    3,161.78x = 5,757,559.00
  5. Step 5: Solve for x
    x = 5,757,559.00/3,161.78
  6. Step 6: Final answer
    x = 1,820.99

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