Finding the Fourth Proportional to 142,522.10, 196,672.28 and 78,856.10

Step by Step Solution

1. Step 1: Write the proportion equation
   142,522.10 : 196,672.28 = 78,856.10 : x
2. Step 2: Convert to fraction form
   142,522.10/196,672.28 = 78,856.10/x
3. Step 3: Cross multiply
   142,522.10x = 196,672.28 × 78,856.10
4. Step 4: Simplify right side
   142,522.10x = 15,508,808,978.91
5. Step 5: Solve for x
   x = 15,508,808,978.91/142,522.10
6. Step 6: Final answer
   x = 108,816.87