Finding the Fourth Proportional to 2,728.16, 4,088.12 and 1,265.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,728.16 : 4,088.12 = 1,265.60 : x
2. Step 2: Convert to fraction form
   2,728.16/4,088.12 = 1,265.60/x
3. Step 3: Cross multiply
   2,728.16x = 4,088.12 × 1,265.60
4. Step 4: Simplify right side
   2,728.16x = 5,173,924.67
5. Step 5: Solve for x
   x = 5,173,924.67/2,728.16
6. Step 6: Final answer
   x = 1,896.49