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Finding the Fourth Proportional to 512,187.80, 768,281.70 and 138,210.20

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Solution

The fourth proportional to 512,187.80, 768,281.70 and 138,210.20 is: 207,315.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    512,187.80 : 768,281.70 = 138,210.20 : x
  2. Step 2: Convert to fraction form
    512,187.80/768,281.70 = 138,210.20/x
  3. Step 3: Cross multiply
    512,187.80x = 768,281.70 × 138,210.20
  4. Step 4: Simplify right side
    512,187.80x = 106,184,367,413.34
  5. Step 5: Solve for x
    x = 106,184,367,413.34/512,187.80
  6. Step 6: Final answer
    x = 207,315.30

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