Finding the Fourth Proportional to 1,069.16, 1,474.98 and 773.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,069.16 : 1,474.98 = 773.78 : x
2. Step 2: Convert to fraction form
   1,069.16/1,474.98 = 773.78/x
3. Step 3: Cross multiply
   1,069.16x = 1,474.98 × 773.78
4. Step 4: Simplify right side
   1,069.16x = 1,141,310.02
5. Step 5: Solve for x
   x = 1,141,310.02/1,069.16
6. Step 6: Final answer
   x = 1,067.48