Finding the Third Proportional to 166,389,022 and 259,656,426

Step by Step Solution

1. Step 1: Write the proportion equation
   166,389,022 : 259,656,426 = 259,656,426 : x
2. Step 2: Convert to fraction form
   166,389,022/259,656,426 = 259,656,426/x
3. Step 3: Cross multiply
   166,389,022x = 259,656,426 × 259,656,426
4. Step 4: Simplify right side
   166,389,022x = 67,421,459,563,093,472
5. Step 5: Solve for x
   x = 67,421,459,563,093,472/166,389,022
6. Step 6: Final answer
   x = 405,203,773.38