Finding the Third Proportional to 86,648,640 and 190,304,256

Step by Step Solution

1. Step 1: Write the proportion equation
   86,648,640 : 190,304,256 = 190,304,256 : x
2. Step 2: Convert to fraction form
   86,648,640/190,304,256 = 190,304,256/x
3. Step 3: Cross multiply
   86,648,640x = 190,304,256 × 190,304,256
4. Step 4: Simplify right side
   86,648,640x = 36,215,709,851,713,536
5. Step 5: Solve for x
   x = 36,215,709,851,713,536/86,648,640
6. Step 6: Final answer
   x = 417,960,511.00