Finding the Fourth Proportional to 1,085.96, 1,628.32 and 956.22

Step by Step Solution

1. Step 1: Write the proportion equation
   1,085.96 : 1,628.32 = 956.22 : x
2. Step 2: Convert to fraction form
   1,085.96/1,628.32 = 956.22/x
3. Step 3: Cross multiply
   1,085.96x = 1,628.32 × 956.22
4. Step 4: Simplify right side
   1,085.96x = 1,557,032.15
5. Step 5: Solve for x
   x = 1,557,032.15/1,085.96
6. Step 6: Final answer
   x = 1,433.78