Finding the Fourth Proportional to 142,648.14, 196,856.85 and 78,116.34

Step by Step Solution

1. Step 1: Write the proportion equation
   142,648.14 : 196,856.85 = 78,116.34 : x
2. Step 2: Convert to fraction form
   142,648.14/196,856.85 = 78,116.34/x
3. Step 3: Cross multiply
   142,648.14x = 196,856.85 × 78,116.34
4. Step 4: Simplify right side
   142,648.14x = 15,377,736,625.93
5. Step 5: Solve for x
   x = 15,377,736,625.93/142,648.14
6. Step 6: Final answer
   x = 107,801.87