Finding the Fourth Proportional to 2,074.06, 3,111.45 and 687.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,074.06 : 3,111.45 = 687.25 : x
2. Step 2: Convert to fraction form
   2,074.06/3,111.45 = 687.25/x
3. Step 3: Cross multiply
   2,074.06x = 3,111.45 × 687.25
4. Step 4: Simplify right side
   2,074.06x = 2,138,344.01
5. Step 5: Solve for x
   x = 2,138,344.01/2,074.06
6. Step 6: Final answer
   x = 1,030.99