Finding the Third Proportional to 399.94 and 592.31

Step by Step Solution

1. Step 1: Write the proportion equation
   399.94 : 592.31 = 592.31 : x
2. Step 2: Convert to fraction form
   399.94/592.31 = 592.31/x
3. Step 3: Cross multiply
   399.94x = 592.31 × 592.31
4. Step 4: Simplify right side
   399.94x = 350,834.10
5. Step 5: Solve for x
   x = 350,834.10/399.94
6. Step 6: Final answer
   x = 877.22