Finding the Fourth Proportional to 1,322.09, 1,822.80 and 1,085.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,322.09 : 1,822.80 = 1,085.18 : x
2. Step 2: Convert to fraction form
   1,322.09/1,822.80 = 1,085.18/x
3. Step 3: Cross multiply
   1,322.09x = 1,822.80 × 1,085.18
4. Step 4: Simplify right side
   1,322.09x = 1,978,066.10
5. Step 5: Solve for x
   x = 1,978,066.10/1,322.09
6. Step 6: Final answer
   x = 1,496.17