Finding the Fourth Proportional to 3,711.59, 5,122.04 and 2,139.69

Step by Step Solution

1. Step 1: Write the proportion equation
   3,711.59 : 5,122.04 = 2,139.69 : x
2. Step 2: Convert to fraction form
   3,711.59/5,122.04 = 2,139.69/x
3. Step 3: Cross multiply
   3,711.59x = 5,122.04 × 2,139.69
4. Step 4: Simplify right side
   3,711.59x = 10,959,557.47
5. Step 5: Solve for x
   x = 10,959,557.47/3,711.59
6. Step 6: Final answer
   x = 2,952.79