Finding the Fourth Proportional to 2,500.47, 3,447.26 and 1,661.21

Step by Step Solution

1. Step 1: Write the proportion equation
   2,500.47 : 3,447.26 = 1,661.21 : x
2. Step 2: Convert to fraction form
   2,500.47/3,447.26 = 1,661.21/x
3. Step 3: Cross multiply
   2,500.47x = 3,447.26 × 1,661.21
4. Step 4: Simplify right side
   2,500.47x = 5,726,616.40
5. Step 5: Solve for x
   x = 5,726,616.40/2,500.47
6. Step 6: Final answer
   x = 2,290.22