Finding the Third Proportional to 156,736 and 220,238

Step by Step Solution

1. Step 1: Write the proportion equation
   156,736 : 220,238 = 220,238 : x
2. Step 2: Convert to fraction form
   156,736/220,238 = 220,238/x
3. Step 3: Cross multiply
   156,736x = 220,238 × 220,238
4. Step 4: Simplify right side
   156,736x = 48,504,776,644
5. Step 5: Solve for x
   x = 48,504,776,644/156,736
6. Step 6: Final answer
   x = 309,468.00