Finding the Fourth Proportional to 108,061.77, 148,946.79 and 72,238.71

Step by Step Solution

1. Step 1: Write the proportion equation
   108,061.77 : 148,946.79 = 72,238.71 : x
2. Step 2: Convert to fraction form
   108,061.77/148,946.79 = 72,238.71/x
3. Step 3: Cross multiply
   108,061.77x = 148,946.79 × 72,238.71
4. Step 4: Simplify right side
   108,061.77x = 10,759,723,968.24
5. Step 5: Solve for x
   x = 10,759,723,968.24/108,061.77
6. Step 6: Final answer
   x = 99,570.13