Finding the Fourth Proportional to 1,148.31, 1,582.37 and 816.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,148.31 : 1,582.37 = 816.18 : x
2. Step 2: Convert to fraction form
   1,148.31/1,582.37 = 816.18/x
3. Step 3: Cross multiply
   1,148.31x = 1,582.37 × 816.18
4. Step 4: Simplify right side
   1,148.31x = 1,291,491.79
5. Step 5: Solve for x
   x = 1,291,491.79/1,148.31
6. Step 6: Final answer
   x = 1,124.69