Finding the Fourth Proportional to 2,074.44, 3,112.56 and 687.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,074.44 : 3,112.56 = 687.96 : x
2. Step 2: Convert to fraction form
   2,074.44/3,112.56 = 687.96/x
3. Step 3: Cross multiply
   2,074.44x = 3,112.56 × 687.96
4. Step 4: Simplify right side
   2,074.44x = 2,141,316.78
5. Step 5: Solve for x
   x = 2,141,316.78/2,074.44
6. Step 6: Final answer
   x = 1,032.24