Finding the Third Proportional to 316,969.50 and 648,514.50

Step by Step Solution

1. Step 1: Write the proportion equation
   316,969.50 : 648,514.50 = 648,514.50 : x
2. Step 2: Convert to fraction form
   316,969.50/648,514.50 = 648,514.50/x
3. Step 3: Cross multiply
   316,969.50x = 648,514.50 × 648,514.50
4. Step 4: Simplify right side
   316,969.50x = 420,571,056,710.25
5. Step 5: Solve for x
   x = 420,571,056,710.25/316,969.50
6. Step 6: Final answer
   x = 1,326,850.24