Finding the Fourth Proportional to 2,517.40, 3,776.71 and 1,055.74

Step by Step Solution

1. Step 1: Write the proportion equation
   2,517.40 : 3,776.71 = 1,055.74 : x
2. Step 2: Convert to fraction form
   2,517.40/3,776.71 = 1,055.74/x
3. Step 3: Cross multiply
   2,517.40x = 3,776.71 × 1,055.74
4. Step 4: Simplify right side
   2,517.40x = 3,987,223.82
5. Step 5: Solve for x
   x = 3,987,223.82/2,517.40
6. Step 6: Final answer
   x = 1,583.87