Finding the Fourth Proportional to 111,713.78, 154,155.86 and 65,766.13

Step by Step Solution

1. Step 1: Write the proportion equation
   111,713.78 : 154,155.86 = 65,766.13 : x
2. Step 2: Convert to fraction form
   111,713.78/154,155.86 = 65,766.13/x
3. Step 3: Cross multiply
   111,713.78x = 154,155.86 × 65,766.13
4. Step 4: Simplify right side
   111,713.78x = 10,138,233,861.42
5. Step 5: Solve for x
   x = 10,138,233,861.42/111,713.78
6. Step 6: Final answer
   x = 90,751.86