Finding the Third Proportional to 264,390 and 397,171.50

Step by Step Solution

1. Step 1: Write the proportion equation
   264,390 : 397,171.50 = 397,171.50 : x
2. Step 2: Convert to fraction form
   264,390/397,171.50 = 397,171.50/x
3. Step 3: Cross multiply
   264,390x = 397,171.50 × 397,171.50
4. Step 4: Simplify right side
   264,390x = 157,745,200,412.25
5. Step 5: Solve for x
   x = 157,745,200,412.25/264,390
6. Step 6: Final answer
   x = 596,638.30