Finding the Fourth Proportional to 1,383.44, 1,909.46 and 942.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,383.44 : 1,909.46 = 942.40 : x
2. Step 2: Convert to fraction form
   1,383.44/1,909.46 = 942.40/x
3. Step 3: Cross multiply
   1,383.44x = 1,909.46 × 942.40
4. Step 4: Simplify right side
   1,383.44x = 1,799,475.10
5. Step 5: Solve for x
   x = 1,799,475.10/1,383.44
6. Step 6: Final answer
   x = 1,300.73