Finding the Fourth Proportional to 142,105.48, 196,104.35 and 78,441.91

Step by Step Solution

1. Step 1: Write the proportion equation
   142,105.48 : 196,104.35 = 78,441.91 : x
2. Step 2: Convert to fraction form
   142,105.48/196,104.35 = 78,441.91/x
3. Step 3: Cross multiply
   142,105.48x = 196,104.35 × 78,441.91
4. Step 4: Simplify right side
   142,105.48x = 15,382,799,773.31
5. Step 5: Solve for x
   x = 15,382,799,773.31/142,105.48
6. Step 6: Final answer
   x = 108,249.17