Finding the Fourth Proportional to 108,103.71, 149,140.17 and 72,236.91

Step by Step Solution

1. Step 1: Write the proportion equation
   108,103.71 : 149,140.17 = 72,236.91 : x
2. Step 2: Convert to fraction form
   108,103.71/149,140.17 = 72,236.91/x
3. Step 3: Cross multiply
   108,103.71x = 149,140.17 × 72,236.91
4. Step 4: Simplify right side
   108,103.71x = 10,773,425,037.67
5. Step 5: Solve for x
   x = 10,773,425,037.67/108,103.71
6. Step 6: Final answer
   x = 99,658.24