Finding the Fourth Proportional to 1,168.16, 1,612.72 and 775.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,168.16 : 1,612.72 = 775.72 : x
2. Step 2: Convert to fraction form
   1,168.16/1,612.72 = 775.72/x
3. Step 3: Cross multiply
   1,168.16x = 1,612.72 × 775.72
4. Step 4: Simplify right side
   1,168.16x = 1,251,019.16
5. Step 5: Solve for x
   x = 1,251,019.16/1,168.16
6. Step 6: Final answer
   x = 1,070.93