Finding the Fourth Proportional to 108,508.79, 149,794.02 and 72,270.50

Step by Step Solution

1. Step 1: Write the proportion equation
   108,508.79 : 149,794.02 = 72,270.50 : x
2. Step 2: Convert to fraction form
   108,508.79/149,794.02 = 72,270.50/x
3. Step 3: Cross multiply
   108,508.79x = 149,794.02 × 72,270.50
4. Step 4: Simplify right side
   108,508.79x = 10,825,688,167.25
5. Step 5: Solve for x
   x = 10,825,688,167.25/108,508.79
6. Step 6: Final answer
   x = 99,767.85