Finding the Third Proportional to 252,085.50 and 399,357

Step by Step Solution

1. Step 1: Write the proportion equation
   252,085.50 : 399,357 = 399,357 : x
2. Step 2: Convert to fraction form
   252,085.50/399,357 = 399,357/x
3. Step 3: Cross multiply
   252,085.50x = 399,357 × 399,357
4. Step 4: Simplify right side
   252,085.50x = 159,486,013,449
5. Step 5: Solve for x
   x = 159,486,013,449/252,085.50
6. Step 6: Final answer
   x = 632,666.35