Finding the Third Proportional to 156,103.50 and 320,065.50

Step by Step Solution

1. Step 1: Write the proportion equation
   156,103.50 : 320,065.50 = 320,065.50 : x
2. Step 2: Convert to fraction form
   156,103.50/320,065.50 = 320,065.50/x
3. Step 3: Cross multiply
   156,103.50x = 320,065.50 × 320,065.50
4. Step 4: Simplify right side
   156,103.50x = 102,441,924,290.25
5. Step 5: Solve for x
   x = 102,441,924,290.25/156,103.50
6. Step 6: Final answer
   x = 656,243.61