Finding the Third Proportional to 3,894,288 and 8,364,256

Step by Step Solution

1. Step 1: Write the proportion equation
   3,894,288 : 8,364,256 = 8,364,256 : x
2. Step 2: Convert to fraction form
   3,894,288/8,364,256 = 8,364,256/x
3. Step 3: Cross multiply
   3,894,288x = 8,364,256 × 8,364,256
4. Step 4: Simplify right side
   3,894,288x = 69,960,778,433,536
5. Step 5: Solve for x
   x = 69,960,778,433,536/3,894,288
6. Step 6: Final answer
   x = 17,964,972.91