Finding the Fourth Proportional to 8,982.82, 13,474.31 and 3,139.45

Step by Step Solution

1. Step 1: Write the proportion equation
   8,982.82 : 13,474.31 = 3,139.45 : x
2. Step 2: Convert to fraction form
   8,982.82/13,474.31 = 3,139.45/x
3. Step 3: Cross multiply
   8,982.82x = 13,474.31 × 3,139.45
4. Step 4: Simplify right side
   8,982.82x = 42,301,896.69
5. Step 5: Solve for x
   x = 42,301,896.69/8,982.82
6. Step 6: Final answer
   x = 4,709.20