Finding the Third Proportional to 142,320 and 220,392

Step by Step Solution

1. Step 1: Write the proportion equation
   142,320 : 220,392 = 220,392 : x
2. Step 2: Convert to fraction form
   142,320/220,392 = 220,392/x
3. Step 3: Cross multiply
   142,320x = 220,392 × 220,392
4. Step 4: Simplify right side
   142,320x = 48,572,633,664
5. Step 5: Solve for x
   x = 48,572,633,664/142,320
6. Step 6: Final answer
   x = 341,291.69