Finding the Fourth Proportional to 142,132.56, 196,142.88 and 78,474.72

Step by Step Solution

1. Step 1: Write the proportion equation
   142,132.56 : 196,142.88 = 78,474.72 : x
2. Step 2: Convert to fraction form
   142,132.56/196,142.88 = 78,474.72/x
3. Step 3: Cross multiply
   142,132.56x = 196,142.88 × 78,474.72
4. Step 4: Simplify right side
   142,132.56x = 15,392,257,587.99
5. Step 5: Solve for x
   x = 15,392,257,587.99/142,132.56
6. Step 6: Final answer
   x = 108,295.08