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Finding the Fourth Proportional to 612,987.10, 845,909.01 and 354,874.96

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Solution

The fourth proportional to 612,987.10, 845,909.01 and 354,874.96 is: 489,719.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,987.10 : 845,909.01 = 354,874.96 : x
  2. Step 2: Convert to fraction form
    612,987.10/845,909.01 = 354,874.96/x
  3. Step 3: Cross multiply
    612,987.10x = 845,909.01 × 354,874.96
  4. Step 4: Simplify right side
    612,987.10x = 300,191,926,087.39
  5. Step 5: Solve for x
    x = 300,191,926,087.39/612,987.10
  6. Step 6: Final answer
    x = 489,719.81

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