Finding the Fourth Proportional to 2,585.00, 3,878.91 and 1,399.01

Step by Step Solution

1. Step 1: Write the proportion equation
   2,585.00 : 3,878.91 = 1,399.01 : x
2. Step 2: Convert to fraction form
   2,585.00/3,878.91 = 1,399.01/x
3. Step 3: Cross multiply
   2,585.00x = 3,878.91 × 1,399.01
4. Step 4: Simplify right side
   2,585.00x = 5,426,614.48
5. Step 5: Solve for x
   x = 5,426,614.48/2,585.00
6. Step 6: Final answer
   x = 2,099.27