Finding the Fourth Proportional to 111,025.19, 153,117.90 and 78,695.85

Step by Step Solution

1. Step 1: Write the proportion equation
   111,025.19 : 153,117.90 = 78,695.85 : x
2. Step 2: Convert to fraction form
   111,025.19/153,117.90 = 78,695.85/x
3. Step 3: Cross multiply
   111,025.19x = 153,117.90 × 78,695.85
4. Step 4: Simplify right side
   111,025.19x = 12,049,743,290.72
5. Step 5: Solve for x
   x = 12,049,743,290.72/111,025.19
6. Step 6: Final answer
   x = 108,531.62