Finding the Fourth Proportional to 1,822.71, 2,728.59 and 1,172.07

Step by Step Solution

1. Step 1: Write the proportion equation
   1,822.71 : 2,728.59 = 1,172.07 : x
2. Step 2: Convert to fraction form
   1,822.71/2,728.59 = 1,172.07/x
3. Step 3: Cross multiply
   1,822.71x = 2,728.59 × 1,172.07
4. Step 4: Simplify right side
   1,822.71x = 3,198,098.48
5. Step 5: Solve for x
   x = 3,198,098.48/1,822.71
6. Step 6: Final answer
   x = 1,754.58