Finding the Fourth Proportional to 89,682.50, 123,761.85 and 51,978.62

Step by Step Solution

1. Step 1: Write the proportion equation
   89,682.50 : 123,761.85 = 51,978.62 : x
2. Step 2: Convert to fraction form
   89,682.50/123,761.85 = 51,978.62/x
3. Step 3: Cross multiply
   89,682.50x = 123,761.85 × 51,978.62
4. Step 4: Simplify right side
   89,682.50x = 6,432,970,171.65
5. Step 5: Solve for x
   x = 6,432,970,171.65/89,682.50
6. Step 6: Final answer
   x = 71,730.50