Finding the Fourth Proportional to 89,682.75, 123,762.20 and 51,978.87

Step by Step Solution

1. Step 1: Write the proportion equation
   89,682.75 : 123,762.20 = 51,978.87 : x
2. Step 2: Convert to fraction form
   89,682.75/123,762.20 = 51,978.87/x
3. Step 3: Cross multiply
   89,682.75x = 123,762.20 × 51,978.87
4. Step 4: Simplify right side
   89,682.75x = 6,433,019,044.82
5. Step 5: Solve for x
   x = 6,433,019,044.82/89,682.75
6. Step 6: Final answer
   x = 71,730.84