Finding the Third Proportional to 258,604,587 and 401,505,162

Step by Step Solution

1. Step 1: Write the proportion equation
   258,604,587 : 401,505,162 = 401,505,162 : x
2. Step 2: Convert to fraction form
   258,604,587/401,505,162 = 401,505,162/x
3. Step 3: Cross multiply
   258,604,587x = 401,505,162 × 401,505,162
4. Step 4: Simplify right side
   258,604,587x = 161,206,395,112,646,240
5. Step 5: Solve for x
   x = 161,206,395,112,646,240/258,604,587
6. Step 6: Final answer
   x = 623,370,207.71