Finding the Fourth Proportional to 2,074.24, 3,111 and 687.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,074.24 : 3,111 = 687.52 : x
2. Step 2: Convert to fraction form
   2,074.24/3,111 = 687.52/x
3. Step 3: Cross multiply
   2,074.24x = 3,111 × 687.52
4. Step 4: Simplify right side
   2,074.24x = 2,138,874.72
5. Step 5: Solve for x
   x = 2,138,874.72/2,074.24
6. Step 6: Final answer
   x = 1,031.16