Finding the Third Proportional to 307,314 and 629,842.50

Step by Step Solution

1. Step 1: Write the proportion equation
   307,314 : 629,842.50 = 629,842.50 : x
2. Step 2: Convert to fraction form
   307,314/629,842.50 = 629,842.50/x
3. Step 3: Cross multiply
   307,314x = 629,842.50 × 629,842.50
4. Step 4: Simplify right side
   307,314x = 396,701,574,806.25
5. Step 5: Solve for x
   x = 396,701,574,806.25/307,314
6. Step 6: Final answer
   x = 1,290,867.24