Finding the Fourth Proportional to 1,665.50, 2,498.28 and 479.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,665.50 : 2,498.28 = 479.54 : x
2. Step 2: Convert to fraction form
   1,665.50/2,498.28 = 479.54/x
3. Step 3: Cross multiply
   1,665.50x = 2,498.28 × 479.54
4. Step 4: Simplify right side
   1,665.50x = 1,198,012.70
5. Step 5: Solve for x
   x = 1,198,012.70/1,665.50
6. Step 6: Final answer
   x = 719.31