Finding the Fourth Proportional to 8,982.96, 13,480.59 and 3,139.57

Step by Step Solution

1. Step 1: Write the proportion equation
   8,982.96 : 13,480.59 = 3,139.57 : x
2. Step 2: Convert to fraction form
   8,982.96/13,480.59 = 3,139.57/x
3. Step 3: Cross multiply
   8,982.96x = 13,480.59 × 3,139.57
4. Step 4: Simplify right side
   8,982.96x = 42,323,255.95
5. Step 5: Solve for x
   x = 42,323,255.95/8,982.96
6. Step 6: Final answer
   x = 4,711.50