Finding the Third Proportional to 388.31 and 601.31

Step by Step Solution

1. Step 1: Write the proportion equation
   388.31 : 601.31 = 601.31 : x
2. Step 2: Convert to fraction form
   388.31/601.31 = 601.31/x
3. Step 3: Cross multiply
   388.31x = 601.31 × 601.31
4. Step 4: Simplify right side
   388.31x = 361,576.72
5. Step 5: Solve for x
   x = 361,576.72/388.31
6. Step 6: Final answer
   x = 931.15