Finding the Fourth Proportional to 142,096.34, 196,091.88 and 78,434.12

Step by Step Solution

1. Step 1: Write the proportion equation
   142,096.34 : 196,091.88 = 78,434.12 : x
2. Step 2: Convert to fraction form
   142,096.34/196,091.88 = 78,434.12/x
3. Step 3: Cross multiply
   142,096.34x = 196,091.88 × 78,434.12
4. Step 4: Simplify right side
   142,096.34x = 15,380,294,046.95
5. Step 5: Solve for x
   x = 15,380,294,046.95/142,096.34
6. Step 6: Final answer
   x = 108,238.50