Finding the Fourth Proportional to 89,682, 123,761.16 and 51,978.12

Step by Step Solution

1. Step 1: Write the proportion equation
   89,682 : 123,761.16 = 51,978.12 : x
2. Step 2: Convert to fraction form
   89,682/123,761.16 = 51,978.12/x
3. Step 3: Cross multiply
   89,682x = 123,761.16 × 51,978.12
4. Step 4: Simplify right side
   89,682x = 6,432,872,425.82
5. Step 5: Solve for x
   x = 6,432,872,425.82/89,682
6. Step 6: Final answer
   x = 71,729.81