Finding the Fourth Proportional to 142,312.42, 196,403.58 and 78,662.62

Step by Step Solution

1. Step 1: Write the proportion equation
   142,312.42 : 196,403.58 = 78,662.62 : x
2. Step 2: Convert to fraction form
   142,312.42/196,403.58 = 78,662.62/x
3. Step 3: Cross multiply
   142,312.42x = 196,403.58 × 78,662.62
4. Step 4: Simplify right side
   142,312.42x = 15,449,620,180.18
5. Step 5: Solve for x
   x = 15,449,620,180.18/142,312.42
6. Step 6: Final answer
   x = 108,561.29