Finding the Fourth Proportional to 1,383.18, 1,908.84 and 753.75

Step by Step Solution

1. Step 1: Write the proportion equation
   1,383.18 : 1,908.84 = 753.75 : x
2. Step 2: Convert to fraction form
   1,383.18/1,908.84 = 753.75/x
3. Step 3: Cross multiply
   1,383.18x = 1,908.84 × 753.75
4. Step 4: Simplify right side
   1,383.18x = 1,438,788.15
5. Step 5: Solve for x
   x = 1,438,788.15/1,383.18
6. Step 6: Final answer
   x = 1,040.20