Finding the Fourth Proportional to 1,096.39, 1,511.31 and 816.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,096.39 : 1,511.31 = 816.18 : x
2. Step 2: Convert to fraction form
   1,096.39/1,511.31 = 816.18/x
3. Step 3: Cross multiply
   1,096.39x = 1,511.31 × 816.18
4. Step 4: Simplify right side
   1,096.39x = 1,233,493.80
5. Step 5: Solve for x
   x = 1,233,493.80/1,096.39
6. Step 6: Final answer
   x = 1,125.05