Finding the Fourth Proportional to 142,282.96, 196,350.42 and 78,620.20

Step by Step Solution

1. Step 1: Write the proportion equation
   142,282.96 : 196,350.42 = 78,620.20 : x
2. Step 2: Convert to fraction form
   142,282.96/196,350.42 = 78,620.20/x
3. Step 3: Cross multiply
   142,282.96x = 196,350.42 × 78,620.20
4. Step 4: Simplify right side
   142,282.96x = 15,437,109,290.48
5. Step 5: Solve for x
   x = 15,437,109,290.48/142,282.96
6. Step 6: Final answer
   x = 108,495.84