Finding the Third Proportional to 264,469.50 and 402,900

Step by Step Solution

1. Step 1: Write the proportion equation
   264,469.50 : 402,900 = 402,900 : x
2. Step 2: Convert to fraction form
   264,469.50/402,900 = 402,900/x
3. Step 3: Cross multiply
   264,469.50x = 402,900 × 402,900
4. Step 4: Simplify right side
   264,469.50x = 162,328,410,000
5. Step 5: Solve for x
   x = 162,328,410,000/264,469.50
6. Step 6: Final answer
   x = 613,788.77