Finding the Fourth Proportional to 1,147.72, 1,582.24 and 816.03

Step by Step Solution

1. Step 1: Write the proportion equation
   1,147.72 : 1,582.24 = 816.03 : x
2. Step 2: Convert to fraction form
   1,147.72/1,582.24 = 816.03/x
3. Step 3: Cross multiply
   1,147.72x = 1,582.24 × 816.03
4. Step 4: Simplify right side
   1,147.72x = 1,291,155.31
5. Step 5: Solve for x
   x = 1,291,155.31/1,147.72
6. Step 6: Final answer
   x = 1,124.97