Finding the Third Proportional to 399,554,952,926 and 820,291,477,882

Step by Step Solution

1. Step 1: Write the proportion equation
   399,554,952,926 : 820,291,477,882 = 820,291,477,882 : x
2. Step 2: Convert to fraction form
   399,554,952,926/820,291,477,882 = 820,291,477,882/x
3. Step 3: Cross multiply
   399,554,952,926x = 820,291,477,882 × 820,291,477,882
4. Step 4: Simplify right side
   399,554,952,926x = 672,878,108,685,835,666,718,720
5. Step 5: Solve for x
   x = 672,878,108,685,835,666,718,720/399,554,952,926
6. Step 6: Final answer
   x = 1,684,068,996,663.04