Finding the Third Proportional to 231,499 and 307,249

Step by Step Solution

1. Step 1: Write the proportion equation
   231,499 : 307,249 = 307,249 : x
2. Step 2: Convert to fraction form
   231,499/307,249 = 307,249/x
3. Step 3: Cross multiply
   231,499x = 307,249 × 307,249
4. Step 4: Simplify right side
   231,499x = 94,401,948,001
5. Step 5: Solve for x
   x = 94,401,948,001/231,499
6. Step 6: Final answer
   x = 407,785.55