Finding the Third Proportional to 306,109.25 and 714,816.50

Step by Step Solution

1. Step 1: Write the proportion equation
   306,109.25 : 714,816.50 = 714,816.50 : x
2. Step 2: Convert to fraction form
   306,109.25/714,816.50 = 714,816.50/x
3. Step 3: Cross multiply
   306,109.25x = 714,816.50 × 714,816.50
4. Step 4: Simplify right side
   306,109.25x = 510,962,628,672.25
5. Step 5: Solve for x
   x = 510,962,628,672.25/306,109.25
6. Step 6: Final answer
   x = 1,669,216.56