Finding the Fourth Proportional to 2,517.72, 3,776.56 and 874.26

Step by Step Solution

1. Step 1: Write the proportion equation
   2,517.72 : 3,776.56 = 874.26 : x
2. Step 2: Convert to fraction form
   2,517.72/3,776.56 = 874.26/x
3. Step 3: Cross multiply
   2,517.72x = 3,776.56 × 874.26
4. Step 4: Simplify right side
   2,517.72x = 3,301,695.35
5. Step 5: Solve for x
   x = 3,301,695.35/2,517.72
6. Step 6: Final answer
   x = 1,311.38