Finding the Fourth Proportional to 2,665.37, 3,997.92 and 2,585.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,665.37 : 3,997.92 = 2,585.18 : x
2. Step 2: Convert to fraction form
   2,665.37/3,997.92 = 2,585.18/x
3. Step 3: Cross multiply
   2,665.37x = 3,997.92 × 2,585.18
4. Step 4: Simplify right side
   2,665.37x = 10,335,342.83
5. Step 5: Solve for x
   x = 10,335,342.83/2,665.37
6. Step 6: Final answer
   x = 3,877.64