Finding the Third Proportional to 142,204.50 and 307,215

Step by Step Solution

1. Step 1: Write the proportion equation
   142,204.50 : 307,215 = 307,215 : x
2. Step 2: Convert to fraction form
   142,204.50/307,215 = 307,215/x
3. Step 3: Cross multiply
   142,204.50x = 307,215 × 307,215
4. Step 4: Simplify right side
   142,204.50x = 94,381,056,225
5. Step 5: Solve for x
   x = 94,381,056,225/142,204.50
6. Step 6: Final answer
   x = 663,699.50