Finding the Fourth Proportional to 1,382.22, 1,906.52 and 884.64

Step by Step Solution

1. Step 1: Write the proportion equation
   1,382.22 : 1,906.52 = 884.64 : x
2. Step 2: Convert to fraction form
   1,382.22/1,906.52 = 884.64/x
3. Step 3: Cross multiply
   1,382.22x = 1,906.52 × 884.64
4. Step 4: Simplify right side
   1,382.22x = 1,686,579.43
5. Step 5: Solve for x
   x = 1,686,579.43/1,382.22
6. Step 6: Final answer
   x = 1,220.20