Finding the Fourth Proportional to 1,543.72, 2,128.42 and 1,018.92

Step by Step Solution

1. Step 1: Write the proportion equation
   1,543.72 : 2,128.42 = 1,018.92 : x
2. Step 2: Convert to fraction form
   1,543.72/2,128.42 = 1,018.92/x
3. Step 3: Cross multiply
   1,543.72x = 2,128.42 × 1,018.92
4. Step 4: Simplify right side
   1,543.72x = 2,168,689.71
5. Step 5: Solve for x
   x = 2,168,689.71/1,543.72
6. Step 6: Final answer
   x = 1,404.85