Finding the Fourth Proportional to 82,978.91, 124,468.82 and 20,649.41

Step by Step Solution

1. Step 1: Write the proportion equation
   82,978.91 : 124,468.82 = 20,649.41 : x
2. Step 2: Convert to fraction form
   82,978.91/124,468.82 = 20,649.41/x
3. Step 3: Cross multiply
   82,978.91x = 124,468.82 × 20,649.41
4. Step 4: Simplify right side
   82,978.91x = 2,570,207,696.40
5. Step 5: Solve for x
   x = 2,570,207,696.40/82,978.91
6. Step 6: Final answer
   x = 30,974.23