Finding the Fourth Proportional to 1,383.67, 1,909.41 and 754.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,383.67 : 1,909.41 = 754.20 : x
2. Step 2: Convert to fraction form
   1,383.67/1,909.41 = 754.20/x
3. Step 3: Cross multiply
   1,383.67x = 1,909.41 × 754.20
4. Step 4: Simplify right side
   1,383.67x = 1,440,077.02
5. Step 5: Solve for x
   x = 1,440,077.02/1,383.67
6. Step 6: Final answer
   x = 1,040.77