Finding the Third Proportional to 188,603 and 406,608.50

Step by Step Solution

1. Step 1: Write the proportion equation
   188,603 : 406,608.50 = 406,608.50 : x
2. Step 2: Convert to fraction form
   188,603/406,608.50 = 406,608.50/x
3. Step 3: Cross multiply
   188,603x = 406,608.50 × 406,608.50
4. Step 4: Simplify right side
   188,603x = 165,330,472,272.25
5. Step 5: Solve for x
   x = 165,330,472,272.25/188,603
6. Step 6: Final answer
   x = 876,605.74