Finding the Fourth Proportional to 1,648.84, 2,470.56 and 1,282.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,648.84 : 2,470.56 = 1,282.72 : x
2. Step 2: Convert to fraction form
   1,648.84/2,470.56 = 1,282.72/x
3. Step 3: Cross multiply
   1,648.84x = 2,470.56 × 1,282.72
4. Step 4: Simplify right side
   1,648.84x = 3,169,036.72
5. Step 5: Solve for x
   x = 3,169,036.72/1,648.84
6. Step 6: Final answer
   x = 1,921.98