Finding the Fourth Proportional to 142,101.50, 196,100.24 and 78,439.29

Step by Step Solution

1. Step 1: Write the proportion equation
   142,101.50 : 196,100.24 = 78,439.29 : x
2. Step 2: Convert to fraction form
   142,101.50/196,100.24 = 78,439.29/x
3. Step 3: Cross multiply
   142,101.50x = 196,100.24 × 78,439.29
4. Step 4: Simplify right side
   142,101.50x = 15,381,963,202.23
5. Step 5: Solve for x
   x = 15,381,963,202.23/142,101.50
6. Step 6: Final answer
   x = 108,246.32