Finding the Fourth Proportional to 91,799.40, 137,569.79 and 72,995.97

Step by Step Solution

1. Step 1: Write the proportion equation
   91,799.40 : 137,569.79 = 72,995.97 : x
2. Step 2: Convert to fraction form
   91,799.40/137,569.79 = 72,995.97/x
3. Step 3: Cross multiply
   91,799.40x = 137,569.79 × 72,995.97
4. Step 4: Simplify right side
   91,799.40x = 10,042,039,210.92
5. Step 5: Solve for x
   x = 10,042,039,210.92/91,799.40
6. Step 6: Final answer
   x = 109,391.13