Finding the Fourth Proportional to 142,391.56, 196,492.50 and 78,725.56

Step by Step Solution

1. Step 1: Write the proportion equation
   142,391.56 : 196,492.50 = 78,725.56 : x
2. Step 2: Convert to fraction form
   142,391.56/196,492.50 = 78,725.56/x
3. Step 3: Cross multiply
   142,391.56x = 196,492.50 × 78,725.56
4. Step 4: Simplify right side
   142,391.56x = 15,468,982,098.30
5. Step 5: Solve for x
   x = 15,468,982,098.30/142,391.56
6. Step 6: Final answer
   x = 108,636.93