Finding the Third Proportional to 207,208.50 and 309,534

Step by Step Solution

1. Step 1: Write the proportion equation
   207,208.50 : 309,534 = 309,534 : x
2. Step 2: Convert to fraction form
   207,208.50/309,534 = 309,534/x
3. Step 3: Cross multiply
   207,208.50x = 309,534 × 309,534
4. Step 4: Simplify right side
   207,208.50x = 95,811,297,156
5. Step 5: Solve for x
   x = 95,811,297,156/207,208.50
6. Step 6: Final answer
   x = 462,390.77