Finding the Fourth Proportional to 142,227.16, 196,260.78 and 81,781.72

Step by Step Solution

1. Step 1: Write the proportion equation
   142,227.16 : 196,260.78 = 81,781.72 : x
2. Step 2: Convert to fraction form
   142,227.16/196,260.78 = 81,781.72/x
3. Step 3: Cross multiply
   142,227.16x = 196,260.78 × 81,781.72
4. Step 4: Simplify right side
   142,227.16x = 16,050,544,156.94
5. Step 5: Solve for x
   x = 16,050,544,156.94/142,227.16
6. Step 6: Final answer
   x = 112,851.47