Finding the Fourth Proportional to 1,383.58, 1,909.34 and 754.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,383.58 : 1,909.34 = 754.15 : x
2. Step 2: Convert to fraction form
   1,383.58/1,909.34 = 754.15/x
3. Step 3: Cross multiply
   1,383.58x = 1,909.34 × 754.15
4. Step 4: Simplify right side
   1,383.58x = 1,439,915.44
5. Step 5: Solve for x
   x = 1,439,915.44/1,383.58
6. Step 6: Final answer
   x = 1,040.72