Finding the Fourth Proportional to 1,648.80, 2,273.46 and 1,317

Step by Step Solution

1. Step 1: Write the proportion equation
   1,648.80 : 2,273.46 = 1,317 : x
2. Step 2: Convert to fraction form
   1,648.80/2,273.46 = 1,317/x
3. Step 3: Cross multiply
   1,648.80x = 2,273.46 × 1,317
4. Step 4: Simplify right side
   1,648.80x = 2,994,146.82
5. Step 5: Solve for x
   x = 2,994,146.82/1,648.80
6. Step 6: Final answer
   x = 1,815.96