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Finding the Fourth Proportional to 219,288, 328,978.08 and 87,960

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Solution

The fourth proportional to 219,288, 328,978.08 and 87,960 is: 131,958.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,288 : 328,978.08 = 87,960 : x
  2. Step 2: Convert to fraction form
    219,288/328,978.08 = 87,960/x
  3. Step 3: Cross multiply
    219,288x = 328,978.08 × 87,960
  4. Step 4: Simplify right side
    219,288x = 28,936,911,916.80
  5. Step 5: Solve for x
    x = 28,936,911,916.80/219,288
  6. Step 6: Final answer
    x = 131,958.48

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