Finding the Fourth Proportional to 2,528.02, 3,490.81 and 1,585.39

Step by Step Solution

1. Step 1: Write the proportion equation
   2,528.02 : 3,490.81 = 1,585.39 : x
2. Step 2: Convert to fraction form
   2,528.02/3,490.81 = 1,585.39/x
3. Step 3: Cross multiply
   2,528.02x = 3,490.81 × 1,585.39
4. Step 4: Simplify right side
   2,528.02x = 5,534,288.52
5. Step 5: Solve for x
   x = 5,534,288.52/2,528.02
6. Step 6: Final answer
   x = 2,189.18