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Finding the Fourth Proportional to 31,978.70, 47,910.59 and 18,823.89

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Solution

The fourth proportional to 31,978.70, 47,910.59 and 18,823.89 is: 28,202.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,978.70 : 47,910.59 = 18,823.89 : x
  2. Step 2: Convert to fraction form
    31,978.70/47,910.59 = 18,823.89/x
  3. Step 3: Cross multiply
    31,978.70x = 47,910.59 × 18,823.89
  4. Step 4: Simplify right side
    31,978.70x = 901,863,832.13
  5. Step 5: Solve for x
    x = 901,863,832.13/31,978.70
  6. Step 6: Final answer
    x = 28,202.02

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