Finding the Fourth Proportional to 1,168.96, 1,612.74 and 820.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,168.96 : 1,612.74 = 820.12 : x
2. Step 2: Convert to fraction form
   1,168.96/1,612.74 = 820.12/x
3. Step 3: Cross multiply
   1,168.96x = 1,612.74 × 820.12
4. Step 4: Simplify right side
   1,168.96x = 1,322,640.33
5. Step 5: Solve for x
   x = 1,322,640.33/1,168.96
6. Step 6: Final answer
   x = 1,131.47