Finding the Third Proportional to 90,660 and 199,442

Step by Step Solution

1. Step 1: Write the proportion equation
   90,660 : 199,442 = 199,442 : x
2. Step 2: Convert to fraction form
   90,660/199,442 = 199,442/x
3. Step 3: Cross multiply
   90,660x = 199,442 × 199,442
4. Step 4: Simplify right side
   90,660x = 39,777,111,364
5. Step 5: Solve for x
   x = 39,777,111,364/90,660
6. Step 6: Final answer
   x = 438,750.40