Finding the Fourth Proportional to 1,009.77, 1,394.17 and 773.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,009.77 : 1,394.17 = 773.30 : x
2. Step 2: Convert to fraction form
   1,009.77/1,394.17 = 773.30/x
3. Step 3: Cross multiply
   1,009.77x = 1,394.17 × 773.30
4. Step 4: Simplify right side
   1,009.77x = 1,078,105.91
5. Step 5: Solve for x
   x = 1,078,105.91/1,009.77
6. Step 6: Final answer
   x = 1,067.68