Finding the Third Proportional to 142,411.50 and 303,228

Step by Step Solution

1. Step 1: Write the proportion equation
   142,411.50 : 303,228 = 303,228 : x
2. Step 2: Convert to fraction form
   142,411.50/303,228 = 303,228/x
3. Step 3: Cross multiply
   142,411.50x = 303,228 × 303,228
4. Step 4: Simplify right side
   142,411.50x = 91,947,219,984
5. Step 5: Solve for x
   x = 91,947,219,984/142,411.50
6. Step 6: Final answer
   x = 645,644.63