Finding the Fourth Proportional to 1,648.72, 2,458.28 and 1,619.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,648.72 : 2,458.28 = 1,619.56 : x
2. Step 2: Convert to fraction form
   1,648.72/2,458.28 = 1,619.56/x
3. Step 3: Cross multiply
   1,648.72x = 2,458.28 × 1,619.56
4. Step 4: Simplify right side
   1,648.72x = 3,981,331.96
5. Step 5: Solve for x
   x = 3,981,331.96/1,648.72
6. Step 6: Final answer
   x = 2,414.80