Finding the Fourth Proportional to 142,293.08, 196,358.06 and 78,629.50

Step by Step Solution

1. Step 1: Write the proportion equation
   142,293.08 : 196,358.06 = 78,629.50 : x
2. Step 2: Convert to fraction form
   142,293.08/196,358.06 = 78,629.50/x
3. Step 3: Cross multiply
   142,293.08x = 196,358.06 × 78,629.50
4. Step 4: Simplify right side
   142,293.08x = 15,439,536,078.77
5. Step 5: Solve for x
   x = 15,439,536,078.77/142,293.08
6. Step 6: Final answer
   x = 108,505.18