Finding the Third Proportional to 142,548 and 307,920

Step by Step Solution

1. Step 1: Write the proportion equation
   142,548 : 307,920 = 307,920 : x
2. Step 2: Convert to fraction form
   142,548/307,920 = 307,920/x
3. Step 3: Cross multiply
   142,548x = 307,920 × 307,920
4. Step 4: Simplify right side
   142,548x = 94,814,726,400
5. Step 5: Solve for x
   x = 94,814,726,400/142,548
6. Step 6: Final answer
   x = 665,142.45