Finding the Third Proportional to 207,222 and 309,553.50

Step by Step Solution

1. Step 1: Write the proportion equation
   207,222 : 309,553.50 = 309,553.50 : x
2. Step 2: Convert to fraction form
   207,222/309,553.50 = 309,553.50/x
3. Step 3: Cross multiply
   207,222x = 309,553.50 × 309,553.50
4. Step 4: Simplify right side
   207,222x = 95,823,369,362.25
5. Step 5: Solve for x
   x = 95,823,369,362.25/207,222
6. Step 6: Final answer
   x = 462,418.90