Finding the Third Proportional to 406,363,398 and 890,361,468

Step by Step Solution

1. Step 1: Write the proportion equation
   406,363,398 : 890,361,468 = 890,361,468 : x
2. Step 2: Convert to fraction form
   406,363,398/890,361,468 = 890,361,468/x
3. Step 3: Cross multiply
   406,363,398x = 890,361,468 × 890,361,468
4. Step 4: Simplify right side
   406,363,398x = 792,743,543,699,115,008
5. Step 5: Solve for x
   x = 792,743,543,699,115,008/406,363,398
6. Step 6: Final answer
   x = 1,950,824,182.49