Finding the Fourth Proportional to 4,693.18, 7,041.38 and 3,139.42

Step by Step Solution

1. Step 1: Write the proportion equation
   4,693.18 : 7,041.38 = 3,139.42 : x
2. Step 2: Convert to fraction form
   4,693.18/7,041.38 = 3,139.42/x
3. Step 3: Cross multiply
   4,693.18x = 7,041.38 × 3,139.42
4. Step 4: Simplify right side
   4,693.18x = 22,105,849.20
5. Step 5: Solve for x
   x = 22,105,849.20/4,693.18
6. Step 6: Final answer
   x = 4,710.21