Finding the Fourth Proportional to 2,585.37, 3,860.50 and 2,515.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,585.37 : 3,860.50 = 2,515.31 : x
2. Step 2: Convert to fraction form
   2,585.37/3,860.50 = 2,515.31/x
3. Step 3: Cross multiply
   2,585.37x = 3,860.50 × 2,515.31
4. Step 4: Simplify right side
   2,585.37x = 9,710,322.38
5. Step 5: Solve for x
   x = 9,710,322.38/2,585.37
6. Step 6: Final answer
   x = 3,755.87