Finding the Fourth Proportional to 108,063.77, 148,949.55 and 72,240.71

Step by Step Solution

1. Step 1: Write the proportion equation
   108,063.77 : 148,949.55 = 72,240.71 : x
2. Step 2: Convert to fraction form
   108,063.77/148,949.55 = 72,240.71/x
3. Step 3: Cross multiply
   108,063.77x = 148,949.55 × 72,240.71
4. Step 4: Simplify right side
   108,063.77x = 10,760,221,246.18
5. Step 5: Solve for x
   x = 10,760,221,246.18/108,063.77
6. Step 6: Final answer
   x = 99,572.88