Finding the Fourth Proportional to 1,632.96, 2,449.12 and 478.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,632.96 : 2,449.12 = 478.72 : x
2. Step 2: Convert to fraction form
   1,632.96/2,449.12 = 478.72/x
3. Step 3: Cross multiply
   1,632.96x = 2,449.12 × 478.72
4. Step 4: Simplify right side
   1,632.96x = 1,172,442.73
5. Step 5: Solve for x
   x = 1,172,442.73/1,632.96
6. Step 6: Final answer
   x = 717.99