Finding the Third Proportional to 389.81 and 597.38

Step by Step Solution

1. Step 1: Write the proportion equation
   389.81 : 597.38 = 597.38 : x
2. Step 2: Convert to fraction form
   389.81/597.38 = 597.38/x
3. Step 3: Cross multiply
   389.81x = 597.38 × 597.38
4. Step 4: Simplify right side
   389.81x = 356,856.89
5. Step 5: Solve for x
   x = 356,856.89/389.81
6. Step 6: Final answer
   x = 915.46