Finding the Fourth Proportional to 142,542.18, 196,705.40 and 78,879.96

Step by Step Solution

1. Step 1: Write the proportion equation
   142,542.18 : 196,705.40 = 78,879.96 : x
2. Step 2: Convert to fraction form
   142,542.18/196,705.40 = 78,879.96/x
3. Step 3: Cross multiply
   142,542.18x = 196,705.40 × 78,879.96
4. Step 4: Simplify right side
   142,542.18x = 15,516,113,689.38
5. Step 5: Solve for x
   x = 15,516,113,689.38/142,542.18
6. Step 6: Final answer
   x = 108,852.79