Finding the Fourth Proportional to 1,442.30, 1,989.44 and 910.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,442.30 : 1,989.44 = 910.24 : x
2. Step 2: Convert to fraction form
   1,442.30/1,989.44 = 910.24/x
3. Step 3: Cross multiply
   1,442.30x = 1,989.44 × 910.24
4. Step 4: Simplify right side
   1,442.30x = 1,810,862.89
5. Step 5: Solve for x
   x = 1,810,862.89/1,442.30
6. Step 6: Final answer
   x = 1,255.54