Finding the Fourth Proportional to 3,648.80, 5,478.27 and 2,535.59

Step by Step Solution

1. Step 1: Write the proportion equation
   3,648.80 : 5,478.27 = 2,535.59 : x
2. Step 2: Convert to fraction form
   3,648.80/5,478.27 = 2,535.59/x
3. Step 3: Cross multiply
   3,648.80x = 5,478.27 × 2,535.59
4. Step 4: Simplify right side
   3,648.80x = 13,890,664.00
5. Step 5: Solve for x
   x = 13,890,664.00/3,648.80
6. Step 6: Final answer
   x = 3,806.91