Finding the Third Proportional to 166,388,982 and 259,656,366

Step by Step Solution

1. Step 1: Write the proportion equation
   166,388,982 : 259,656,366 = 259,656,366 : x
2. Step 2: Convert to fraction form
   166,388,982/259,656,366 = 259,656,366/x
3. Step 3: Cross multiply
   166,388,982x = 259,656,366 × 259,656,366
4. Step 4: Simplify right side
   166,388,982x = 67,421,428,404,325,952
5. Step 5: Solve for x
   x = 67,421,428,404,325,952/166,388,982
6. Step 6: Final answer
   x = 405,203,683.52