Finding the Fourth Proportional to 1,648.28, 2,271.86 and 1,249.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,648.28 : 2,271.86 = 1,249.82 : x
2. Step 2: Convert to fraction form
   1,648.28/2,271.86 = 1,249.82/x
3. Step 3: Cross multiply
   1,648.28x = 2,271.86 × 1,249.82
4. Step 4: Simplify right side
   1,648.28x = 2,839,416.07
5. Step 5: Solve for x
   x = 2,839,416.07/1,648.28
6. Step 6: Final answer
   x = 1,722.65