Finding the Fourth Proportional to 1,166.89, 1,612.61 and 956.73

Step by Step Solution

1. Step 1: Write the proportion equation
   1,166.89 : 1,612.61 = 956.73 : x
2. Step 2: Convert to fraction form
   1,166.89/1,612.61 = 956.73/x
3. Step 3: Cross multiply
   1,166.89x = 1,612.61 × 956.73
4. Step 4: Simplify right side
   1,166.89x = 1,542,828.15
5. Step 5: Solve for x
   x = 1,542,828.15/1,166.89
6. Step 6: Final answer
   x = 1,322.17