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Finding the Fourth Proportional to 615,491.40, 921,681.90 and 403,984.20

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Solution

The fourth proportional to 615,491.40, 921,681.90 and 403,984.20 is: 604,955.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,491.40 : 921,681.90 = 403,984.20 : x
  2. Step 2: Convert to fraction form
    615,491.40/921,681.90 = 403,984.20/x
  3. Step 3: Cross multiply
    615,491.40x = 921,681.90 × 403,984.20
  4. Step 4: Simplify right side
    615,491.40x = 372,344,925,025.98
  5. Step 5: Solve for x
    x = 372,344,925,025.98/615,491.40
  6. Step 6: Final answer
    x = 604,955.53

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