Finding the Fourth Proportional to 1,103.82, 1,521.25 and 916.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,103.82 : 1,521.25 = 916.30 : x
2. Step 2: Convert to fraction form
   1,103.82/1,521.25 = 916.30/x
3. Step 3: Cross multiply
   1,103.82x = 1,521.25 × 916.30
4. Step 4: Simplify right side
   1,103.82x = 1,393,921.38
5. Step 5: Solve for x
   x = 1,393,921.38/1,103.82
6. Step 6: Final answer
   x = 1,262.82