Finding the Fourth Proportional to 82,517.91, 123,665.97 and 45,021.78

Step by Step Solution

1. Step 1: Write the proportion equation
   82,517.91 : 123,665.97 = 45,021.78 : x
2. Step 2: Convert to fraction form
   82,517.91/123,665.97 = 45,021.78/x
3. Step 3: Cross multiply
   82,517.91x = 123,665.97 × 45,021.78
4. Step 4: Simplify right side
   82,517.91x = 5,567,662,094.83
5. Step 5: Solve for x
   x = 5,567,662,094.83/82,517.91
6. Step 6: Final answer
   x = 67,472.17