Finding the Fourth Proportional to 142,252.89, 196,307.60 and 78,589.32

Step by Step Solution

1. Step 1: Write the proportion equation
   142,252.89 : 196,307.60 = 78,589.32 : x
2. Step 2: Convert to fraction form
   142,252.89/196,307.60 = 78,589.32/x
3. Step 3: Cross multiply
   142,252.89x = 196,307.60 × 78,589.32
4. Step 4: Simplify right side
   142,252.89x = 15,427,680,401.89
5. Step 5: Solve for x
   x = 15,427,680,401.89/142,252.89
6. Step 6: Final answer
   x = 108,452.49