Finding the Third Proportional to 318,519 and 464,629.50

Step by Step Solution

1. Step 1: Write the proportion equation
   318,519 : 464,629.50 = 464,629.50 : x
2. Step 2: Convert to fraction form
   318,519/464,629.50 = 464,629.50/x
3. Step 3: Cross multiply
   318,519x = 464,629.50 × 464,629.50
4. Step 4: Simplify right side
   318,519x = 215,880,572,270.25
5. Step 5: Solve for x
   x = 215,880,572,270.25/318,519
6. Step 6: Final answer
   x = 677,763.56