Finding the Fourth Proportional to 3,139.30, 4,710.15 and 3,090.10

Step by Step Solution

1. Step 1: Write the proportion equation
   3,139.30 : 4,710.15 = 3,090.10 : x
2. Step 2: Convert to fraction form
   3,139.30/4,710.15 = 3,090.10/x
3. Step 3: Cross multiply
   3,139.30x = 4,710.15 × 3,090.10
4. Step 4: Simplify right side
   3,139.30x = 14,554,834.52
5. Step 5: Solve for x
   x = 14,554,834.52/3,139.30
6. Step 6: Final answer
   x = 4,636.33