Finding the Fourth Proportional to 1,111.09, 1,662.51 and 698.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111.09 : 1,662.51 = 698.30 : x
2. Step 2: Convert to fraction form
   1,111.09/1,662.51 = 698.30/x
3. Step 3: Cross multiply
   1,111.09x = 1,662.51 × 698.30
4. Step 4: Simplify right side
   1,111.09x = 1,160,930.73
5. Step 5: Solve for x
   x = 1,160,930.73/1,111.09
6. Step 6: Final answer
   x = 1,044.86