Finding the Third Proportional to 329,115,042 and 685,470,748.50

Step by Step Solution

1. Step 1: Write the proportion equation
   329,115,042 : 685,470,748.50 = 685,470,748.50 : x
2. Step 2: Convert to fraction form
   329,115,042/685,470,748.50 = 685,470,748.50/x
3. Step 3: Cross multiply
   329,115,042x = 685,470,748.50 × 685,470,748.50
4. Step 4: Simplify right side
   329,115,042x = 469,870,147,049,150,272
5. Step 5: Solve for x
   x = 469,870,147,049,150,272/329,115,042
6. Step 6: Final answer
   x = 1,427,677,520.28