Finding the Third Proportional to 91,474 and 200,438

Step by Step Solution

1. Step 1: Write the proportion equation
   91,474 : 200,438 = 200,438 : x
2. Step 2: Convert to fraction form
   91,474/200,438 = 200,438/x
3. Step 3: Cross multiply
   91,474x = 200,438 × 200,438
4. Step 4: Simplify right side
   91,474x = 40,175,391,844
5. Step 5: Solve for x
   x = 40,175,391,844/91,474
6. Step 6: Final answer
   x = 439,200.12