Finding the Fourth Proportional to 8,982.28, 13,475.34 and 3,139.08

Step by Step Solution

1. Step 1: Write the proportion equation
   8,982.28 : 13,475.34 = 3,139.08 : x
2. Step 2: Convert to fraction form
   8,982.28/13,475.34 = 3,139.08/x
3. Step 3: Cross multiply
   8,982.28x = 13,475.34 × 3,139.08
4. Step 4: Simplify right side
   8,982.28x = 42,300,170.29
5. Step 5: Solve for x
   x = 42,300,170.29/8,982.28
6. Step 6: Final answer
   x = 4,709.29