Finding the Fourth Proportional to 142,397.71, 196,514.99 and 78,735.50

Step by Step Solution

1. Step 1: Write the proportion equation
   142,397.71 : 196,514.99 = 78,735.50 : x
2. Step 2: Convert to fraction form
   142,397.71/196,514.99 = 78,735.50/x
3. Step 3: Cross multiply
   142,397.71x = 196,514.99 × 78,735.50
4. Step 4: Simplify right side
   142,397.71x = 15,472,705,995.15
5. Step 5: Solve for x
   x = 15,472,705,995.15/142,397.71
6. Step 6: Final answer
   x = 108,658.39