Finding the Fourth Proportional to 1,520.72, 2,280.88 and 480.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,520.72 : 2,280.88 = 480.82 : x
2. Step 2: Convert to fraction form
   1,520.72/2,280.88 = 480.82/x
3. Step 3: Cross multiply
   1,520.72x = 2,280.88 × 480.82
4. Step 4: Simplify right side
   1,520.72x = 1,096,699.83
5. Step 5: Solve for x
   x = 1,096,699.83/1,520.72
6. Step 6: Final answer
   x = 721.17