Finding the Third Proportional to 122,687 and 264,705.50

Step by Step Solution

1. Step 1: Write the proportion equation
   122,687 : 264,705.50 = 264,705.50 : x
2. Step 2: Convert to fraction form
   122,687/264,705.50 = 264,705.50/x
3. Step 3: Cross multiply
   122,687x = 264,705.50 × 264,705.50
4. Step 4: Simplify right side
   122,687x = 70,069,001,730.25
5. Step 5: Solve for x
   x = 70,069,001,730.25/122,687
6. Step 6: Final answer
   x = 571,120.02