Finding the Third Proportional to 142,906.50 and 305,487

Step by Step Solution

1. Step 1: Write the proportion equation
   142,906.50 : 305,487 = 305,487 : x
2. Step 2: Convert to fraction form
   142,906.50/305,487 = 305,487/x
3. Step 3: Cross multiply
   142,906.50x = 305,487 × 305,487
4. Step 4: Simplify right side
   142,906.50x = 93,322,307,169
5. Step 5: Solve for x
   x = 93,322,307,169/142,906.50
6. Step 6: Final answer
   x = 653,030.53