Finding the Fourth Proportional to 142,096.91, 196,093.76 and 78,434.72

Step by Step Solution

1. Step 1: Write the proportion equation
   142,096.91 : 196,093.76 = 78,434.72 : x
2. Step 2: Convert to fraction form
   142,096.91/196,093.76 = 78,434.72/x
3. Step 3: Cross multiply
   142,096.91x = 196,093.76 × 78,434.72
4. Step 4: Simplify right side
   142,096.91x = 15,380,558,767.17
5. Step 5: Solve for x
   x = 15,380,558,767.17/142,096.91
6. Step 6: Final answer
   x = 108,239.92