Finding the Fourth Proportional to 1,440.38, 1,985.91 and 942.23

Step by Step Solution

1. Step 1: Write the proportion equation
   1,440.38 : 1,985.91 = 942.23 : x
2. Step 2: Convert to fraction form
   1,440.38/1,985.91 = 942.23/x
3. Step 3: Cross multiply
   1,440.38x = 1,985.91 × 942.23
4. Step 4: Simplify right side
   1,440.38x = 1,871,179.27
5. Step 5: Solve for x
   x = 1,871,179.27/1,440.38
6. Step 6: Final answer
   x = 1,299.09