Finding the Fourth Proportional to 1,647.72, 2,472.50 and 673.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,647.72 : 2,472.50 = 673.61 : x
2. Step 2: Convert to fraction form
   1,647.72/2,472.50 = 673.61/x
3. Step 3: Cross multiply
   1,647.72x = 2,472.50 × 673.61
4. Step 4: Simplify right side
   1,647.72x = 1,665,490.05
5. Step 5: Solve for x
   x = 1,665,490.05/1,647.72
6. Step 6: Final answer
   x = 1,010.78