Finding the Fourth Proportional to 1,543.05, 2,311.34 and 1,108.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,543.05 : 2,311.34 = 1,108.89 : x
2. Step 2: Convert to fraction form
   1,543.05/2,311.34 = 1,108.89/x
3. Step 3: Cross multiply
   1,543.05x = 2,311.34 × 1,108.89
4. Step 4: Simplify right side
   1,543.05x = 2,563,016.27
5. Step 5: Solve for x
   x = 2,563,016.27/1,543.05
6. Step 6: Final answer
   x = 1,661.01