Finding the Fourth Proportional to 108,063.76, 148,949.48 and 72,240.72

Step by Step Solution

1. Step 1: Write the proportion equation
   108,063.76 : 148,949.48 = 72,240.72 : x
2. Step 2: Convert to fraction form
   108,063.76/148,949.48 = 72,240.72/x
3. Step 3: Cross multiply
   108,063.76x = 148,949.48 × 72,240.72
4. Step 4: Simplify right side
   108,063.76x = 10,760,217,678.83
5. Step 5: Solve for x
   x = 10,760,217,678.83/108,063.76
6. Step 6: Final answer
   x = 99,572.86