Finding the Fourth Proportional to 142,380.56, 196,477.32 and 78,714.56

Step by Step Solution

1. Step 1: Write the proportion equation
   142,380.56 : 196,477.32 = 78,714.56 : x
2. Step 2: Convert to fraction form
   142,380.56/196,477.32 = 78,714.56/x
3. Step 3: Cross multiply
   142,380.56x = 196,477.32 × 78,714.56
4. Step 4: Simplify right side
   142,380.56x = 15,465,625,793.78
5. Step 5: Solve for x
   x = 15,465,625,793.78/142,380.56
6. Step 6: Final answer
   x = 108,621.75