Finding the Fourth Proportional to 1,003.19, 1,383.05 and 767.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,003.19 : 1,383.05 = 767.27 : x
2. Step 2: Convert to fraction form
   1,003.19/1,383.05 = 767.27/x
3. Step 3: Cross multiply
   1,003.19x = 1,383.05 × 767.27
4. Step 4: Simplify right side
   1,003.19x = 1,061,162.02
5. Step 5: Solve for x
   x = 1,061,162.02/1,003.19
6. Step 6: Final answer
   x = 1,057.79