Finding the Third Proportional to 188,455.50 and 406,435.78

Step by Step Solution

1. Step 1: Write the proportion equation
   188,455.50 : 406,435.78 = 406,435.78 : x
2. Step 2: Convert to fraction form
   188,455.50/406,435.78 = 406,435.78/x
3. Step 3: Cross multiply
   188,455.50x = 406,435.78 × 406,435.78
4. Step 4: Simplify right side
   188,455.50x = 165,190,044,280.30
5. Step 5: Solve for x
   x = 165,190,044,280.30/188,455.50
6. Step 6: Final answer
   x = 876,546.69