Finding the Fourth Proportional to 89,912.24, 124,125.52 and 65,686

Step by Step Solution

1. Step 1: Write the proportion equation
   89,912.24 : 124,125.52 = 65,686 : x
2. Step 2: Convert to fraction form
   89,912.24/124,125.52 = 65,686/x
3. Step 3: Cross multiply
   89,912.24x = 124,125.52 × 65,686
4. Step 4: Simplify right side
   89,912.24x = 8,153,308,906.72
5. Step 5: Solve for x
   x = 8,153,308,906.72/89,912.24
6. Step 6: Final answer
   x = 90,680.74