Finding the Fourth Proportional to 1,445.85, 1,995.33 and 816.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,445.85 : 1,995.33 = 816.48 : x
2. Step 2: Convert to fraction form
   1,445.85/1,995.33 = 816.48/x
3. Step 3: Cross multiply
   1,445.85x = 1,995.33 × 816.48
4. Step 4: Simplify right side
   1,445.85x = 1,629,150.10
5. Step 5: Solve for x
   x = 1,629,150.10/1,445.85
6. Step 6: Final answer
   x = 1,126.78