Finding the Fourth Proportional to 111,711.96, 154,111.08 and 98,978.04

Step by Step Solution

1. Step 1: Write the proportion equation
   111,711.96 : 154,111.08 = 98,978.04 : x
2. Step 2: Convert to fraction form
   111,711.96/154,111.08 = 98,978.04/x
3. Step 3: Cross multiply
   111,711.96x = 154,111.08 × 98,978.04
4. Step 4: Simplify right side
   111,711.96x = 15,253,612,640.68
5. Step 5: Solve for x
   x = 15,253,612,640.68/111,711.96
6. Step 6: Final answer
   x = 136,544.13