Finding the Fourth Proportional to 2,642.25, 3,961.62 and 1,255.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,642.25 : 3,961.62 = 1,255.80 : x
2. Step 2: Convert to fraction form
   2,642.25/3,961.62 = 1,255.80/x
3. Step 3: Cross multiply
   2,642.25x = 3,961.62 × 1,255.80
4. Step 4: Simplify right side
   2,642.25x = 4,975,002.40
5. Step 5: Solve for x
   x = 4,975,002.40/2,642.25
6. Step 6: Final answer
   x = 1,882.87