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Finding the Fourth Proportional to 278,679.40, 418,019.10 and 194,698.60

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Solution

The fourth proportional to 278,679.40, 418,019.10 and 194,698.60 is: 292,047.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,679.40 : 418,019.10 = 194,698.60 : x
  2. Step 2: Convert to fraction form
    278,679.40/418,019.10 = 194,698.60/x
  3. Step 3: Cross multiply
    278,679.40x = 418,019.10 × 194,698.60
  4. Step 4: Simplify right side
    278,679.40x = 81,387,733,543.26
  5. Step 5: Solve for x
    x = 81,387,733,543.26/278,679.40
  6. Step 6: Final answer
    x = 292,047.90

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