Finding the Fourth Proportional to 2,561.52, 3,841.02 and 1,328.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,561.52 : 3,841.02 = 1,328.60 : x
2. Step 2: Convert to fraction form
   2,561.52/3,841.02 = 1,328.60/x
3. Step 3: Cross multiply
   2,561.52x = 3,841.02 × 1,328.60
4. Step 4: Simplify right side
   2,561.52x = 5,103,188.77
5. Step 5: Solve for x
   x = 5,103,188.77/2,561.52
6. Step 6: Final answer
   x = 1,992.25