Finding the Third Proportional to 401,715,887 and 870,468,997

Step by Step Solution

1. Step 1: Write the proportion equation
   401,715,887 : 870,468,997 = 870,468,997 : x
2. Step 2: Convert to fraction form
   401,715,887/870,468,997 = 870,468,997/x
3. Step 3: Cross multiply
   401,715,887x = 870,468,997 × 870,468,997
4. Step 4: Simplify right side
   401,715,887x = 757,716,274,738,185,984
5. Step 5: Solve for x
   x = 757,716,274,738,185,984/401,715,887
6. Step 6: Final answer
   x = 1,886,199,424.17