Finding the Fourth Proportional to 1,168.68, 1,612.90 and 889.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,168.68 : 1,612.90 = 889.72 : x
2. Step 2: Convert to fraction form
   1,168.68/1,612.90 = 889.72/x
3. Step 3: Cross multiply
   1,168.68x = 1,612.90 × 889.72
4. Step 4: Simplify right side
   1,168.68x = 1,435,029.39
5. Step 5: Solve for x
   x = 1,435,029.39/1,168.68
6. Step 6: Final answer
   x = 1,227.91