Finding the Fourth Proportional to 1,111.88, 1,664.73 and 722.33

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111.88 : 1,664.73 = 722.33 : x
2. Step 2: Convert to fraction form
   1,111.88/1,664.73 = 722.33/x
3. Step 3: Cross multiply
   1,111.88x = 1,664.73 × 722.33
4. Step 4: Simplify right side
   1,111.88x = 1,202,476.10
5. Step 5: Solve for x
   x = 1,202,476.10/1,111.88
6. Step 6: Final answer
   x = 1,081.48