Finding the Fourth Proportional to 142,108.50, 196,111.32 and 78,446.34

Step by Step Solution

1. Step 1: Write the proportion equation
   142,108.50 : 196,111.32 = 78,446.34 : x
2. Step 2: Convert to fraction form
   142,108.50/196,111.32 = 78,446.34/x
3. Step 3: Cross multiply
   142,108.50x = 196,111.32 × 78,446.34
4. Step 4: Simplify right side
   142,108.50x = 15,384,215,286.57
5. Step 5: Solve for x
   x = 15,384,215,286.57/142,108.50
6. Step 6: Final answer
   x = 108,256.83