Finding the Fourth Proportional to 1,145.67, 1,580.76 and 773.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,145.67 : 1,580.76 = 773.34 : x
2. Step 2: Convert to fraction form
   1,145.67/1,580.76 = 773.34/x
3. Step 3: Cross multiply
   1,145.67x = 1,580.76 × 773.34
4. Step 4: Simplify right side
   1,145.67x = 1,222,464.94
5. Step 5: Solve for x
   x = 1,222,464.94/1,145.67
6. Step 6: Final answer
   x = 1,067.03