Finding the Fourth Proportional to 1,111.62, 1,663.92 and 699.33

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111.62 : 1,663.92 = 699.33 : x
2. Step 2: Convert to fraction form
   1,111.62/1,663.92 = 699.33/x
3. Step 3: Cross multiply
   1,111.62x = 1,663.92 × 699.33
4. Step 4: Simplify right side
   1,111.62x = 1,163,629.17
5. Step 5: Solve for x
   x = 1,163,629.17/1,111.62
6. Step 6: Final answer
   x = 1,046.79