Finding the Fourth Proportional to 1,455.34, 2,185.22 and 910.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,455.34 : 2,185.22 = 910.96 : x
2. Step 2: Convert to fraction form
   1,455.34/2,185.22 = 910.96/x
3. Step 3: Cross multiply
   1,455.34x = 2,185.22 × 910.96
4. Step 4: Simplify right side
   1,455.34x = 1,990,648.01
5. Step 5: Solve for x
   x = 1,990,648.01/1,455.34
6. Step 6: Final answer
   x = 1,367.82