Finding the Third Proportional to 305,581,861.69 and 661,929,678.56

Step by Step Solution

1. Step 1: Write the proportion equation
   305,581,861.69 : 661,929,678.56 = 661,929,678.56 : x
2. Step 2: Convert to fraction form
   305,581,861.69/661,929,678.56 = 661,929,678.56/x
3. Step 3: Cross multiply
   305,581,861.69x = 661,929,678.56 × 661,929,678.56
4. Step 4: Simplify right side
   305,581,861.69x = 438,150,899,361,854,592
5. Step 5: Solve for x
   x = 438,150,899,361,854,592/305,581,861.69
6. Step 6: Final answer
   x = 1,433,824,955.91