Finding the Third Proportional to 313,308.50 and 662,333.50

Step by Step Solution

1. Step 1: Write the proportion equation
   313,308.50 : 662,333.50 = 662,333.50 : x
2. Step 2: Convert to fraction form
   313,308.50/662,333.50 = 662,333.50/x
3. Step 3: Cross multiply
   313,308.50x = 662,333.50 × 662,333.50
4. Step 4: Simplify right side
   313,308.50x = 438,685,665,222.25
5. Step 5: Solve for x
   x = 438,685,665,222.25/313,308.50
6. Step 6: Final answer
   x = 1,400,171.60