Finding the Fourth Proportional to 82,610.16, 123,915.42 and 20,280.84

Step by Step Solution

1. Step 1: Write the proportion equation
   82,610.16 : 123,915.42 = 20,280.84 : x
2. Step 2: Convert to fraction form
   82,610.16/123,915.42 = 20,280.84/x
3. Step 3: Cross multiply
   82,610.16x = 123,915.42 × 20,280.84
4. Step 4: Simplify right side
   82,610.16x = 2,513,108,806.55
5. Step 5: Solve for x
   x = 2,513,108,806.55/82,610.16
6. Step 6: Final answer
   x = 30,421.30