Finding the Third Proportional to 133,986 and 287,398

Step by Step Solution

1. Step 1: Write the proportion equation
   133,986 : 287,398 = 287,398 : x
2. Step 2: Convert to fraction form
   133,986/287,398 = 287,398/x
3. Step 3: Cross multiply
   133,986x = 287,398 × 287,398
4. Step 4: Simplify right side
   133,986x = 82,597,610,404
5. Step 5: Solve for x
   x = 82,597,610,404/133,986
6. Step 6: Final answer
   x = 616,464.48