Finding the Fourth Proportional to 142,579.56, 196,757.34 and 78,915.96

Step by Step Solution

1. Step 1: Write the proportion equation
   142,579.56 : 196,757.34 = 78,915.96 : x
2. Step 2: Convert to fraction form
   142,579.56/196,757.34 = 78,915.96/x
3. Step 3: Cross multiply
   142,579.56x = 196,757.34 × 78,915.96
4. Step 4: Simplify right side
   142,579.56x = 15,527,294,373.15
5. Step 5: Solve for x
   x = 15,527,294,373.15/142,579.56
6. Step 6: Final answer
   x = 108,902.67