Finding the Fourth Proportional to 108,085.29, 149,114.83 and 72,218.49

Step by Step Solution

1. Step 1: Write the proportion equation
   108,085.29 : 149,114.83 = 72,218.49 : x
2. Step 2: Convert to fraction form
   108,085.29/149,114.83 = 72,218.49/x
3. Step 3: Cross multiply
   108,085.29x = 149,114.83 × 72,218.49
4. Step 4: Simplify right side
   108,085.29x = 10,768,847,859.21
5. Step 5: Solve for x
   x = 10,768,847,859.21/108,085.29
6. Step 6: Final answer
   x = 99,632.87