Finding the Fourth Proportional to 2,025.40, 2,806.81 and 1,986.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,025.40 : 2,806.81 = 1,986.52 : x
2. Step 2: Convert to fraction form
   2,025.40/2,806.81 = 1,986.52/x
3. Step 3: Cross multiply
   2,025.40x = 2,806.81 × 1,986.52
4. Step 4: Simplify right side
   2,025.40x = 5,575,784.20
5. Step 5: Solve for x
   x = 5,575,784.20/2,025.40
6. Step 6: Final answer
   x = 2,752.93