Finding the Fourth Proportional to 108,061.26, 148,946.04 and 72,238.20

Step by Step Solution

1. Step 1: Write the proportion equation
   108,061.26 : 148,946.04 = 72,238.20 : x
2. Step 2: Convert to fraction form
   108,061.26/148,946.04 = 72,238.20/x
3. Step 3: Cross multiply
   108,061.26x = 148,946.04 × 72,238.20
4. Step 4: Simplify right side
   108,061.26x = 10,759,593,826.73
5. Step 5: Solve for x
   x = 10,759,593,826.73/108,061.26
6. Step 6: Final answer
   x = 99,569.39