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Finding the Fourth Proportional to 712,724.32, 983,559.72 and 390,446.02

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Solution

The fourth proportional to 712,724.32, 983,559.72 and 390,446.02 is: 538,815.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,724.32 : 983,559.72 = 390,446.02 : x
  2. Step 2: Convert to fraction form
    712,724.32/983,559.72 = 390,446.02/x
  3. Step 3: Cross multiply
    712,724.32x = 983,559.72 × 390,446.02
  4. Step 4: Simplify right side
    712,724.32x = 384,026,978,106.31
  5. Step 5: Solve for x
    x = 384,026,978,106.31/712,724.32
  6. Step 6: Final answer
    x = 538,815.59

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