Finding the Third Proportional to 134,949.50 and 288,581.50

Step by Step Solution

1. Step 1: Write the proportion equation
   134,949.50 : 288,581.50 = 288,581.50 : x
2. Step 2: Convert to fraction form
   134,949.50/288,581.50 = 288,581.50/x
3. Step 3: Cross multiply
   134,949.50x = 288,581.50 × 288,581.50
4. Step 4: Simplify right side
   134,949.50x = 83,279,282,142.25
5. Step 5: Solve for x
   x = 83,279,282,142.25/134,949.50
6. Step 6: Final answer
   x = 617,114.42