Finding the Fourth Proportional to 82,480.71, 123,719.98 and 20,151.75

Step by Step Solution

1. Step 1: Write the proportion equation
   82,480.71 : 123,719.98 = 20,151.75 : x
2. Step 2: Convert to fraction form
   82,480.71/123,719.98 = 20,151.75/x
3. Step 3: Cross multiply
   82,480.71x = 123,719.98 × 20,151.75
4. Step 4: Simplify right side
   82,480.71x = 2,493,174,106.97
5. Step 5: Solve for x
   x = 2,493,174,106.97/82,480.71
6. Step 6: Final answer
   x = 30,227.36