Finding the Fourth Proportional to 1,543.72, 2,128.12 and 1,100.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,543.72 : 2,128.12 = 1,100.86 : x
2. Step 2: Convert to fraction form
   1,543.72/2,128.12 = 1,100.86/x
3. Step 3: Cross multiply
   1,543.72x = 2,128.12 × 1,100.86
4. Step 4: Simplify right side
   1,543.72x = 2,342,751.54
5. Step 5: Solve for x
   x = 2,342,751.54/1,543.72
6. Step 6: Final answer
   x = 1,517.60