Finding the Fourth Proportional to 3,642.45, 5,025.90 and 2,149.80

Step by Step Solution

1. Step 1: Write the proportion equation
   3,642.45 : 5,025.90 = 2,149.80 : x
2. Step 2: Convert to fraction form
   3,642.45/5,025.90 = 2,149.80/x
3. Step 3: Cross multiply
   3,642.45x = 5,025.90 × 2,149.80
4. Step 4: Simplify right side
   3,642.45x = 10,804,679.82
5. Step 5: Solve for x
   x = 10,804,679.82/3,642.45
6. Step 6: Final answer
   x = 2,966.32