Finding the Fourth Proportional to 80,777.31, 121,439.63 and 65,092.47

Step by Step Solution

1. Step 1: Write the proportion equation
   80,777.31 : 121,439.63 = 65,092.47 : x
2. Step 2: Convert to fraction form
   80,777.31/121,439.63 = 65,092.47/x
3. Step 3: Cross multiply
   80,777.31x = 121,439.63 × 65,092.47
4. Step 4: Simplify right side
   80,777.31x = 7,904,805,472.59
5. Step 5: Solve for x
   x = 7,904,805,472.59/80,777.31
6. Step 6: Final answer
   x = 97,859.23