Finding the Fourth Proportional to 1,394.31, 1,924.15 and 773.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,394.31 : 1,924.15 = 773.31 : x
2. Step 2: Convert to fraction form
   1,394.31/1,924.15 = 773.31/x
3. Step 3: Cross multiply
   1,394.31x = 1,924.15 × 773.31
4. Step 4: Simplify right side
   1,394.31x = 1,487,971.18
5. Step 5: Solve for x
   x = 1,487,971.18/1,394.31
6. Step 6: Final answer
   x = 1,067.17