Finding the Fourth Proportional to 1,647.57, 2,470.46 and 672.87

Step by Step Solution

1. Step 1: Write the proportion equation
   1,647.57 : 2,470.46 = 672.87 : x
2. Step 2: Convert to fraction form
   1,647.57/2,470.46 = 672.87/x
3. Step 3: Cross multiply
   1,647.57x = 2,470.46 × 672.87
4. Step 4: Simplify right side
   1,647.57x = 1,662,295.06
5. Step 5: Solve for x
   x = 1,662,295.06/1,647.57
6. Step 6: Final answer
   x = 1,008.94