Finding the Fourth Proportional to 1,111.04, 1,666.42 and 698.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111.04 : 1,666.42 = 698.88 : x
2. Step 2: Convert to fraction form
   1,111.04/1,666.42 = 698.88/x
3. Step 3: Cross multiply
   1,111.04x = 1,666.42 × 698.88
4. Step 4: Simplify right side
   1,111.04x = 1,164,625.86
5. Step 5: Solve for x
   x = 1,164,625.86/1,111.04
6. Step 6: Final answer
   x = 1,048.24