Finding the Fourth Proportional to 108,105.16, 149,142.10 and 72,238.36

Step by Step Solution

1. Step 1: Write the proportion equation
   108,105.16 : 149,142.10 = 72,238.36 : x
2. Step 2: Convert to fraction form
   108,105.16/149,142.10 = 72,238.36/x
3. Step 3: Cross multiply
   108,105.16x = 149,142.10 × 72,238.36
4. Step 4: Simplify right side
   108,105.16x = 10,773,780,710.96
5. Step 5: Solve for x
   x = 10,773,780,710.96/108,105.16
6. Step 6: Final answer
   x = 99,660.19