Finding the Fourth Proportional to 1,383.29, 1,909.60 and 886.67

Step by Step Solution

1. Step 1: Write the proportion equation
   1,383.29 : 1,909.60 = 886.67 : x
2. Step 2: Convert to fraction form
   1,383.29/1,909.60 = 886.67/x
3. Step 3: Cross multiply
   1,383.29x = 1,909.60 × 886.67
4. Step 4: Simplify right side
   1,383.29x = 1,693,173.27
5. Step 5: Solve for x
   x = 1,693,173.27/1,383.29
6. Step 6: Final answer
   x = 1,224.02