Finding the Third Proportional to 198,288 and 307,145.25

Step by Step Solution

1. Step 1: Write the proportion equation
   198,288 : 307,145.25 = 307,145.25 : x
2. Step 2: Convert to fraction form
   198,288/307,145.25 = 307,145.25/x
3. Step 3: Cross multiply
   198,288x = 307,145.25 × 307,145.25
4. Step 4: Simplify right side
   198,288x = 94,338,204,597.56
5. Step 5: Solve for x
   x = 94,338,204,597.56/198,288
6. Step 6: Final answer
   x = 475,763.56