Finding the Fourth Proportional to 3,711.42, 5,122.23 and 2,139.52

Step by Step Solution

1. Step 1: Write the proportion equation
   3,711.42 : 5,122.23 = 2,139.52 : x
2. Step 2: Convert to fraction form
   3,711.42/5,122.23 = 2,139.52/x
3. Step 3: Cross multiply
   3,711.42x = 5,122.23 × 2,139.52
4. Step 4: Simplify right side
   3,711.42x = 10,959,113.53
5. Step 5: Solve for x
   x = 10,959,113.53/3,711.42
6. Step 6: Final answer
   x = 2,952.81