Finding the Fourth Proportional to 1,632.47, 2,449.55 and 810.73

Step by Step Solution

1. Step 1: Write the proportion equation
   1,632.47 : 2,449.55 = 810.73 : x
2. Step 2: Convert to fraction form
   1,632.47/2,449.55 = 810.73/x
3. Step 3: Cross multiply
   1,632.47x = 2,449.55 × 810.73
4. Step 4: Simplify right side
   1,632.47x = 1,985,919.57
5. Step 5: Solve for x
   x = 1,985,919.57/1,632.47
6. Step 6: Final answer
   x = 1,216.51