Finding the Fourth Proportional to 1,105.47, 1,657.89 and 697.23

Step by Step Solution

1. Step 1: Write the proportion equation
   1,105.47 : 1,657.89 = 697.23 : x
2. Step 2: Convert to fraction form
   1,105.47/1,657.89 = 697.23/x
3. Step 3: Cross multiply
   1,105.47x = 1,657.89 × 697.23
4. Step 4: Simplify right side
   1,105.47x = 1,155,930.64
5. Step 5: Solve for x
   x = 1,155,930.64/1,105.47
6. Step 6: Final answer
   x = 1,045.65