Finding the Third Proportional to 142,770 and 307,072.50

Step by Step Solution

1. Step 1: Write the proportion equation
   142,770 : 307,072.50 = 307,072.50 : x
2. Step 2: Convert to fraction form
   142,770/307,072.50 = 307,072.50/x
3. Step 3: Cross multiply
   142,770x = 307,072.50 × 307,072.50
4. Step 4: Simplify right side
   142,770x = 94,293,520,256.25
5. Step 5: Solve for x
   x = 94,293,520,256.25/142,770
6. Step 6: Final answer
   x = 660,457.52