Finding the Third Proportional to 188,608.50 and 399,006

Step by Step Solution

1. Step 1: Write the proportion equation
   188,608.50 : 399,006 = 399,006 : x
2. Step 2: Convert to fraction form
   188,608.50/399,006 = 399,006/x
3. Step 3: Cross multiply
   188,608.50x = 399,006 × 399,006
4. Step 4: Simplify right side
   188,608.50x = 159,205,788,036
5. Step 5: Solve for x
   x = 159,205,788,036/188,608.50
6. Step 6: Final answer
   x = 844,107.17