Finding the Fourth Proportional to 8,982.42, 13,476.87 and 3,139.89

Step by Step Solution

1. Step 1: Write the proportion equation
   8,982.42 : 13,476.87 = 3,139.89 : x
2. Step 2: Convert to fraction form
   8,982.42/13,476.87 = 3,139.89/x
3. Step 3: Cross multiply
   8,982.42x = 13,476.87 × 3,139.89
4. Step 4: Simplify right side
   8,982.42x = 42,315,889.34
5. Step 5: Solve for x
   x = 42,315,889.34/8,982.42
6. Step 6: Final answer
   x = 4,710.97