Finding the Fourth Proportional to 1,662.72, 2,494.02 and 687.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,662.72 : 2,494.02 = 687.72 : x
2. Step 2: Convert to fraction form
   1,662.72/2,494.02 = 687.72/x
3. Step 3: Cross multiply
   1,662.72x = 2,494.02 × 687.72
4. Step 4: Simplify right side
   1,662.72x = 1,715,187.43
5. Step 5: Solve for x
   x = 1,715,187.43/1,662.72
6. Step 6: Final answer
   x = 1,031.56