Finding the Fourth Proportional to 2,074.27, 3,111.24 and 687.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,074.27 : 3,111.24 = 687.15 : x
2. Step 2: Convert to fraction form
   2,074.27/3,111.24 = 687.15/x
3. Step 3: Cross multiply
   2,074.27x = 3,111.24 × 687.15
4. Step 4: Simplify right side
   2,074.27x = 2,137,897.66
5. Step 5: Solve for x
   x = 2,137,897.66/2,074.27
6. Step 6: Final answer
   x = 1,030.67