Finding the Third Proportional to 381.94 and 864.56

Step by Step Solution

1. Step 1: Write the proportion equation
   381.94 : 864.56 = 864.56 : x
2. Step 2: Convert to fraction form
   381.94/864.56 = 864.56/x
3. Step 3: Cross multiply
   381.94x = 864.56 × 864.56
4. Step 4: Simplify right side
   381.94x = 747,468.32
5. Step 5: Solve for x
   x = 747,468.32/381.94
6. Step 6: Final answer
   x = 1,957.04