Finding the Fourth Proportional to 108,554.92, 149,857.10 and 72,768.31

Step by Step Solution

1. Step 1: Write the proportion equation
   108,554.92 : 149,857.10 = 72,768.31 : x
2. Step 2: Convert to fraction form
   108,554.92/149,857.10 = 72,768.31/x
3. Step 3: Cross multiply
   108,554.92x = 149,857.10 × 72,768.31
4. Step 4: Simplify right side
   108,554.92x = 10,904,847,908.50
5. Step 5: Solve for x
   x = 10,904,847,908.50/108,554.92
6. Step 6: Final answer
   x = 100,454.66