Finding the Third Proportional to 156,600 and 333,720

Step by Step Solution

1. Step 1: Write the proportion equation
   156,600 : 333,720 = 333,720 : x
2. Step 2: Convert to fraction form
   156,600/333,720 = 333,720/x
3. Step 3: Cross multiply
   156,600x = 333,720 × 333,720
4. Step 4: Simplify right side
   156,600x = 111,369,038,400
5. Step 5: Solve for x
   x = 111,369,038,400/156,600
6. Step 6: Final answer
   x = 711,168.83