Finding the Fourth Proportional to 1,648.72, 2,275.77 and 1,089.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,648.72 : 2,275.77 = 1,089.69 : x
2. Step 2: Convert to fraction form
   1,648.72/2,275.77 = 1,089.69/x
3. Step 3: Cross multiply
   1,648.72x = 2,275.77 × 1,089.69
4. Step 4: Simplify right side
   1,648.72x = 2,479,883.81
5. Step 5: Solve for x
   x = 2,479,883.81/1,648.72
6. Step 6: Final answer
   x = 1,504.13