Finding the Fourth Proportional to 1,442.16, 1,990.28 and 945.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,442.16 : 1,990.28 = 945.24 : x
2. Step 2: Convert to fraction form
   1,442.16/1,990.28 = 945.24/x
3. Step 3: Cross multiply
   1,442.16x = 1,990.28 × 945.24
4. Step 4: Simplify right side
   1,442.16x = 1,881,292.27
5. Step 5: Solve for x
   x = 1,881,292.27/1,442.16
6. Step 6: Final answer
   x = 1,304.50