Finding the Third Proportional to 188,943 and 399,214.50

Step by Step Solution

1. Step 1: Write the proportion equation
   188,943 : 399,214.50 = 399,214.50 : x
2. Step 2: Convert to fraction form
   188,943/399,214.50 = 399,214.50/x
3. Step 3: Cross multiply
   188,943x = 399,214.50 × 399,214.50
4. Step 4: Simplify right side
   188,943x = 159,372,217,010.25
5. Step 5: Solve for x
   x = 159,372,217,010.25/188,943
6. Step 6: Final answer
   x = 843,493.63