Finding the Fourth Proportional to 1,164.48, 1,608.84 and 816.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,164.48 : 1,608.84 = 816.72 : x
2. Step 2: Convert to fraction form
   1,164.48/1,608.84 = 816.72/x
3. Step 3: Cross multiply
   1,164.48x = 1,608.84 × 816.72
4. Step 4: Simplify right side
   1,164.48x = 1,313,971.80
5. Step 5: Solve for x
   x = 1,313,971.80/1,164.48
6. Step 6: Final answer
   x = 1,128.38