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Finding the Fourth Proportional to 1,986,978.40, 2,978,426.40 and 974,543.20

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Solution

The fourth proportional to 1,986,978.40, 2,978,426.40 and 974,543.20 is: 1,460,813.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,986,978.40 : 2,978,426.40 = 974,543.20 : x
  2. Step 2: Convert to fraction form
    1,986,978.40/2,978,426.40 = 974,543.20/x
  3. Step 3: Cross multiply
    1,986,978.40x = 2,978,426.40 × 974,543.20
  4. Step 4: Simplify right side
    1,986,978.40x = 2,902,605,194,820.48
  5. Step 5: Solve for x
    x = 2,902,605,194,820.48/1,986,978.40
  6. Step 6: Final answer
    x = 1,460,813.66

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