Finding the Third Proportional to 318,513 and 464,620.50

Step by Step Solution

1. Step 1: Write the proportion equation
   318,513 : 464,620.50 = 464,620.50 : x
2. Step 2: Convert to fraction form
   318,513/464,620.50 = 464,620.50/x
3. Step 3: Cross multiply
   318,513x = 464,620.50 × 464,620.50
4. Step 4: Simplify right side
   318,513x = 215,872,209,020.25
5. Step 5: Solve for x
   x = 215,872,209,020.25/318,513
6. Step 6: Final answer
   x = 677,750.07