Finding the Third Proportional to 134,188.50 and 289,398

Step by Step Solution

1. Step 1: Write the proportion equation
   134,188.50 : 289,398 = 289,398 : x
2. Step 2: Convert to fraction form
   134,188.50/289,398 = 289,398/x
3. Step 3: Cross multiply
   134,188.50x = 289,398 × 289,398
4. Step 4: Simplify right side
   134,188.50x = 83,751,202,404
5. Step 5: Solve for x
   x = 83,751,202,404/134,188.50
6. Step 6: Final answer
   x = 624,131.00