Finding the Fourth Proportional to 82,540.96, 123,810.20 and 20,211.44

Step by Step Solution

1. Step 1: Write the proportion equation
   82,540.96 : 123,810.20 = 20,211.44 : x
2. Step 2: Convert to fraction form
   82,540.96/123,810.20 = 20,211.44/x
3. Step 3: Cross multiply
   82,540.96x = 123,810.20 × 20,211.44
4. Step 4: Simplify right side
   82,540.96x = 2,502,382,428.69
5. Step 5: Solve for x
   x = 2,502,382,428.69/82,540.96
6. Step 6: Final answer
   x = 30,316.86