Finding the Fourth Proportional to 139,666.78, 192,760.91 and 82,287.76

Step by Step Solution

1. Step 1: Write the proportion equation
   139,666.78 : 192,760.91 = 82,287.76 : x
2. Step 2: Convert to fraction form
   139,666.78/192,760.91 = 82,287.76/x
3. Step 3: Cross multiply
   139,666.78x = 192,760.91 × 82,287.76
4. Step 4: Simplify right side
   139,666.78x = 15,861,862,124.22
5. Step 5: Solve for x
   x = 15,861,862,124.22/139,666.78
6. Step 6: Final answer
   x = 113,569.33