Finding the Third Proportional to 144,618 and 300,172.50

Step by Step Solution

1. Step 1: Write the proportion equation
   144,618 : 300,172.50 = 300,172.50 : x
2. Step 2: Convert to fraction form
   144,618/300,172.50 = 300,172.50/x
3. Step 3: Cross multiply
   144,618x = 300,172.50 × 300,172.50
4. Step 4: Simplify right side
   144,618x = 90,103,529,756.25
5. Step 5: Solve for x
   x = 90,103,529,756.25/144,618
6. Step 6: Final answer
   x = 623,045.05