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Finding the Fourth Proportional to 713,963.60, 985,265.76 and 391,665.44

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Solution

The fourth proportional to 713,963.60, 985,265.76 and 391,665.44 is: 540,496.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,963.60 : 985,265.76 = 391,665.44 : x
  2. Step 2: Convert to fraction form
    713,963.60/985,265.76 = 391,665.44/x
  3. Step 3: Cross multiply
    713,963.60x = 985,265.76 × 391,665.44
  4. Step 4: Simplify right side
    713,963.60x = 385,894,547,407.33
  5. Step 5: Solve for x
    x = 385,894,547,407.33/713,963.60
  6. Step 6: Final answer
    x = 540,496.11

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