Finding the Fourth Proportional to 1,760.27, 2,638.91 and 1,109.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,760.27 : 2,638.91 = 1,109.57 : x
2. Step 2: Convert to fraction form
   1,760.27/2,638.91 = 1,109.57/x
3. Step 3: Cross multiply
   1,760.27x = 2,638.91 × 1,109.57
4. Step 4: Simplify right side
   1,760.27x = 2,928,044.95
5. Step 5: Solve for x
   x = 2,928,044.95/1,760.27
6. Step 6: Final answer
   x = 1,663.41