Finding the Fourth Proportional to 1,109.88, 1,665.72 and 675.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,109.88 : 1,665.72 = 675.72 : x
2. Step 2: Convert to fraction form
   1,109.88/1,665.72 = 675.72/x
3. Step 3: Cross multiply
   1,109.88x = 1,665.72 × 675.72
4. Step 4: Simplify right side
   1,109.88x = 1,125,560.32
5. Step 5: Solve for x
   x = 1,125,560.32/1,109.88
6. Step 6: Final answer
   x = 1,014.13