Finding the Fourth Proportional to 8,271.55, 12,407.40 and 2,428.27

Step by Step Solution

1. Step 1: Write the proportion equation
   8,271.55 : 12,407.40 = 2,428.27 : x
2. Step 2: Convert to fraction form
   8,271.55/12,407.40 = 2,428.27/x
3. Step 3: Cross multiply
   8,271.55x = 12,407.40 × 2,428.27
4. Step 4: Simplify right side
   8,271.55x = 30,128,517.20
5. Step 5: Solve for x
   x = 30,128,517.20/8,271.55
6. Step 6: Final answer
   x = 3,642.43