Finding the Fourth Proportional to 3,665.16, 5,491.98 and 2,553.48

Step by Step Solution

1. Step 1: Write the proportion equation
   3,665.16 : 5,491.98 = 2,553.48 : x
2. Step 2: Convert to fraction form
   3,665.16/5,491.98 = 2,553.48/x
3. Step 3: Cross multiply
   3,665.16x = 5,491.98 × 2,553.48
4. Step 4: Simplify right side
   3,665.16x = 14,023,661.09
5. Step 5: Solve for x
   x = 14,023,661.09/3,665.16
6. Step 6: Final answer
   x = 3,826.21