Finding the Third Proportional to 90,939.38 and 198,164.25

Step by Step Solution

1. Step 1: Write the proportion equation
   90,939.38 : 198,164.25 = 198,164.25 : x
2. Step 2: Convert to fraction form
   90,939.38/198,164.25 = 198,164.25/x
3. Step 3: Cross multiply
   90,939.38x = 198,164.25 × 198,164.25
4. Step 4: Simplify right side
   90,939.38x = 39,269,069,978.06
5. Step 5: Solve for x
   x = 39,269,069,978.06/90,939.38
6. Step 6: Final answer
   x = 431,815.92