Finding the Third Proportional to 399,910.50 and 613,230

Step by Step Solution

1. Step 1: Write the proportion equation
   399,910.50 : 613,230 = 613,230 : x
2. Step 2: Convert to fraction form
   399,910.50/613,230 = 613,230/x
3. Step 3: Cross multiply
   399,910.50x = 613,230 × 613,230
4. Step 4: Simplify right side
   399,910.50x = 376,051,032,900
5. Step 5: Solve for x
   x = 376,051,032,900/399,910.50
6. Step 6: Final answer
   x = 940,337.98