Finding the Fourth Proportional to 1,382.27, 1,906.31 and 884.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,382.27 : 1,906.31 = 884.72 : x
2. Step 2: Convert to fraction form
   1,382.27/1,906.31 = 884.72/x
3. Step 3: Cross multiply
   1,382.27x = 1,906.31 × 884.72
4. Step 4: Simplify right side
   1,382.27x = 1,686,536.63
5. Step 5: Solve for x
   x = 1,686,536.63/1,382.27
6. Step 6: Final answer
   x = 1,220.13