Finding the Fourth Proportional to 1,549.18, 2,321.52 and 816.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,549.18 : 2,321.52 = 816.54 : x
2. Step 2: Convert to fraction form
   1,549.18/2,321.52 = 816.54/x
3. Step 3: Cross multiply
   1,549.18x = 2,321.52 × 816.54
4. Step 4: Simplify right side
   1,549.18x = 1,895,613.94
5. Step 5: Solve for x
   x = 1,895,613.94/1,549.18
6. Step 6: Final answer
   x = 1,223.62