Finding the Fourth Proportional to 108,061.20, 162,237.60 and 68,695.20

Step by Step Solution

1. Step 1: Write the proportion equation
   108,061.20 : 162,237.60 = 68,695.20 : x
2. Step 2: Convert to fraction form
   108,061.20/162,237.60 = 68,695.20/x
3. Step 3: Cross multiply
   108,061.20x = 162,237.60 × 68,695.20
4. Step 4: Simplify right side
   108,061.20x = 11,144,944,379.52
5. Step 5: Solve for x
   x = 11,144,944,379.52/108,061.20
6. Step 6: Final answer
   x = 103,135.49