Finding the Fourth Proportional to 142,688.16, 196,892.76 and 82,278.66

Step by Step Solution

1. Step 1: Write the proportion equation
   142,688.16 : 196,892.76 = 82,278.66 : x
2. Step 2: Convert to fraction form
   142,688.16/196,892.76 = 82,278.66/x
3. Step 3: Cross multiply
   142,688.16x = 196,892.76 × 82,278.66
4. Step 4: Simplify right side
   142,688.16x = 16,200,072,456.50
5. Step 5: Solve for x
   x = 16,200,072,456.50/142,688.16
6. Step 6: Final answer
   x = 113,534.81