Finding the Third Proportional to 188,490.50 and 406,503

Step by Step Solution

1. Step 1: Write the proportion equation
   188,490.50 : 406,503 = 406,503 : x
2. Step 2: Convert to fraction form
   188,490.50/406,503 = 406,503/x
3. Step 3: Cross multiply
   188,490.50x = 406,503 × 406,503
4. Step 4: Simplify right side
   188,490.50x = 165,244,689,009
5. Step 5: Solve for x
   x = 165,244,689,009/188,490.50
6. Step 6: Final answer
   x = 876,673.83