Finding the Fourth Proportional to 142,105.60, 196,109.94 and 78,447.52

Step by Step Solution

1. Step 1: Write the proportion equation
   142,105.60 : 196,109.94 = 78,447.52 : x
2. Step 2: Convert to fraction form
   142,105.60/196,109.94 = 78,447.52/x
3. Step 3: Cross multiply
   142,105.60x = 196,109.94 × 78,447.52
4. Step 4: Simplify right side
   142,105.60x = 15,384,338,440.35
5. Step 5: Solve for x
   x = 15,384,338,440.35/142,105.60
6. Step 6: Final answer
   x = 108,259.90