Finding the Fourth Proportional to 1,098.39, 1,514.06 and 818.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,098.39 : 1,514.06 = 818.18 : x
2. Step 2: Convert to fraction form
   1,098.39/1,514.06 = 818.18/x
3. Step 3: Cross multiply
   1,098.39x = 1,514.06 × 818.18
4. Step 4: Simplify right side
   1,098.39x = 1,238,773.61
5. Step 5: Solve for x
   x = 1,238,773.61/1,098.39
6. Step 6: Final answer
   x = 1,127.81