Finding the Third Proportional to 253,315.50 and 395,310

Step by Step Solution

1. Step 1: Write the proportion equation
   253,315.50 : 395,310 = 395,310 : x
2. Step 2: Convert to fraction form
   253,315.50/395,310 = 395,310/x
3. Step 3: Cross multiply
   253,315.50x = 395,310 × 395,310
4. Step 4: Simplify right side
   253,315.50x = 156,269,996,100
5. Step 5: Solve for x
   x = 156,269,996,100/253,315.50
6. Step 6: Final answer
   x = 616,898.67