Finding the Fourth Proportional to 142,081.29, 196,071.98 and 78,418.94

Step by Step Solution

1. Step 1: Write the proportion equation
   142,081.29 : 196,071.98 = 78,418.94 : x
2. Step 2: Convert to fraction form
   142,081.29/196,071.98 = 78,418.94/x
3. Step 3: Cross multiply
   142,081.29x = 196,071.98 × 78,418.94
4. Step 4: Simplify right side
   142,081.29x = 15,375,755,462.85
5. Step 5: Solve for x
   x = 15,375,755,462.85/142,081.29
6. Step 6: Final answer
   x = 108,218.02