Finding the Fourth Proportional to 1,103.28, 1,521.82 and 881.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,103.28 : 1,521.82 = 881.88 : x
2. Step 2: Convert to fraction form
   1,103.28/1,521.82 = 881.88/x
3. Step 3: Cross multiply
   1,103.28x = 1,521.82 × 881.88
4. Step 4: Simplify right side
   1,103.28x = 1,342,062.62
5. Step 5: Solve for x
   x = 1,342,062.62/1,103.28
6. Step 6: Final answer
   x = 1,216.43