Finding the Fourth Proportional to 3,710.92, 5,121.54 and 2,139.02

Step by Step Solution

1. Step 1: Write the proportion equation
   3,710.92 : 5,121.54 = 2,139.02 : x
2. Step 2: Convert to fraction form
   3,710.92/5,121.54 = 2,139.02/x
3. Step 3: Cross multiply
   3,710.92x = 5,121.54 × 2,139.02
4. Step 4: Simplify right side
   3,710.92x = 10,955,089.29
5. Step 5: Solve for x
   x = 10,955,089.29/3,710.92
6. Step 6: Final answer
   x = 2,952.12