Finding the Fourth Proportional to 3,723.88, 5,139.02 and 2,045.28

Step by Step Solution

1. Step 1: Write the proportion equation
   3,723.88 : 5,139.02 = 2,045.28 : x
2. Step 2: Convert to fraction form
   3,723.88/5,139.02 = 2,045.28/x
3. Step 3: Cross multiply
   3,723.88x = 5,139.02 × 2,045.28
4. Step 4: Simplify right side
   3,723.88x = 10,510,734.83
5. Step 5: Solve for x
   x = 10,510,734.83/3,723.88
6. Step 6: Final answer
   x = 2,822.52