Finding the Fourth Proportional to 1,084.12, 1,496.22 and 664.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,084.12 : 1,496.22 = 664.54 : x
2. Step 2: Convert to fraction form
   1,084.12/1,496.22 = 664.54/x
3. Step 3: Cross multiply
   1,084.12x = 1,496.22 × 664.54
4. Step 4: Simplify right side
   1,084.12x = 994,298.04
5. Step 5: Solve for x
   x = 994,298.04/1,084.12
6. Step 6: Final answer
   x = 917.15