Finding the Fourth Proportional to 1,383.56, 1,908.48 and 886.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,383.56 : 1,908.48 = 886.02 : x
2. Step 2: Convert to fraction form
   1,383.56/1,908.48 = 886.02/x
3. Step 3: Cross multiply
   1,383.56x = 1,908.48 × 886.02
4. Step 4: Simplify right side
   1,383.56x = 1,690,951.45
5. Step 5: Solve for x
   x = 1,690,951.45/1,383.56
6. Step 6: Final answer
   x = 1,222.17