Finding the Third Proportional to 139,815,984 and 217,085,256

Step by Step Solution

1. Step 1: Write the proportion equation
   139,815,984 : 217,085,256 = 217,085,256 : x
2. Step 2: Convert to fraction form
   139,815,984/217,085,256 = 217,085,256/x
3. Step 3: Cross multiply
   139,815,984x = 217,085,256 × 217,085,256
4. Step 4: Simplify right side
   139,815,984x = 47,126,008,372,585,536
5. Step 5: Solve for x
   x = 47,126,008,372,585,536/139,815,984
6. Step 6: Final answer
   x = 337,057,373.73