Finding the Fourth Proportional to 1,238.68, 1,710.12 and 773.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,238.68 : 1,710.12 = 773.56 : x
2. Step 2: Convert to fraction form
   1,238.68/1,710.12 = 773.56/x
3. Step 3: Cross multiply
   1,238.68x = 1,710.12 × 773.56
4. Step 4: Simplify right side
   1,238.68x = 1,322,880.43
5. Step 5: Solve for x
   x = 1,322,880.43/1,238.68
6. Step 6: Final answer
   x = 1,067.98