Finding the Fourth Proportional to 142,220.16, 196,251.12 and 81,774.72

Step by Step Solution

1. Step 1: Write the proportion equation
   142,220.16 : 196,251.12 = 81,774.72 : x
2. Step 2: Convert to fraction form
   142,220.16/196,251.12 = 81,774.72/x
3. Step 3: Cross multiply
   142,220.16x = 196,251.12 × 81,774.72
4. Step 4: Simplify right side
   142,220.16x = 16,048,380,387.69
5. Step 5: Solve for x
   x = 16,048,380,387.69/142,220.16
6. Step 6: Final answer
   x = 112,841.81