Finding the Fourth Proportional to 108,553.92, 149,855.72 and 72,767.31

Step by Step Solution

1. Step 1: Write the proportion equation
   108,553.92 : 149,855.72 = 72,767.31 : x
2. Step 2: Convert to fraction form
   108,553.92/149,855.72 = 72,767.31/x
3. Step 3: Cross multiply
   108,553.92x = 149,855.72 × 72,767.31
4. Step 4: Simplify right side
   108,553.92x = 10,904,597,268.68
5. Step 5: Solve for x
   x = 10,904,597,268.68/108,553.92
6. Step 6: Final answer
   x = 100,453.28