Finding the Fourth Proportional to 1,151.09, 1,728.25 and 1,098.84

Step by Step Solution

1. Step 1: Write the proportion equation
   1,151.09 : 1,728.25 = 1,098.84 : x
2. Step 2: Convert to fraction form
   1,151.09/1,728.25 = 1,098.84/x
3. Step 3: Cross multiply
   1,151.09x = 1,728.25 × 1,098.84
4. Step 4: Simplify right side
   1,151.09x = 1,899,067.48
5. Step 5: Solve for x
   x = 1,899,067.48/1,151.09
6. Step 6: Final answer
   x = 1,649.81