Finding the Fourth Proportional to 1,086.86, 1,638.37 and 1,024.22

Step by Step Solution

1. Step 1: Write the proportion equation
   1,086.86 : 1,638.37 = 1,024.22 : x
2. Step 2: Convert to fraction form
   1,086.86/1,638.37 = 1,024.22/x
3. Step 3: Cross multiply
   1,086.86x = 1,638.37 × 1,024.22
4. Step 4: Simplify right side
   1,086.86x = 1,678,046.20
5. Step 5: Solve for x
   x = 1,678,046.20/1,086.86
6. Step 6: Final answer
   x = 1,543.94