Finding the Fourth Proportional to 142,105.10, 196,103.94 and 78,442.88

Step by Step Solution

1. Step 1: Write the proportion equation
   142,105.10 : 196,103.94 = 78,442.88 : x
2. Step 2: Convert to fraction form
   142,105.10/196,103.94 = 78,442.88/x
3. Step 3: Cross multiply
   142,105.10x = 196,103.94 × 78,442.88
4. Step 4: Simplify right side
   142,105.10x = 15,382,957,832.95
5. Step 5: Solve for x
   x = 15,382,957,832.95/142,105.10
6. Step 6: Final answer
   x = 108,250.57