Finding the Third Proportional to 142,485 and 304,039.50

Step by Step Solution

1. Step 1: Write the proportion equation
   142,485 : 304,039.50 = 304,039.50 : x
2. Step 2: Convert to fraction form
   142,485/304,039.50 = 304,039.50/x
3. Step 3: Cross multiply
   142,485x = 304,039.50 × 304,039.50
4. Step 4: Simplify right side
   142,485x = 92,440,017,560.25
5. Step 5: Solve for x
   x = 92,440,017,560.25/142,485
6. Step 6: Final answer
   x = 648,770.17