Finding the Fourth Proportional to 142,291.59, 196,362.46 and 78,629.39

Step by Step Solution

1. Step 1: Write the proportion equation
   142,291.59 : 196,362.46 = 78,629.39 : x
2. Step 2: Convert to fraction form
   142,291.59/196,362.46 = 78,629.39/x
3. Step 3: Cross multiply
   142,291.59x = 196,362.46 × 78,629.39
4. Step 4: Simplify right side
   142,291.59x = 15,439,860,448.70
5. Step 5: Solve for x
   x = 15,439,860,448.70/142,291.59
6. Step 6: Final answer
   x = 108,508.59