Finding the Third Proportional to 6,429,864 and 8,756,388

Step by Step Solution

1. Step 1: Write the proportion equation
   6,429,864 : 8,756,388 = 8,756,388 : x
2. Step 2: Convert to fraction form
   6,429,864/8,756,388 = 8,756,388/x
3. Step 3: Cross multiply
   6,429,864x = 8,756,388 × 8,756,388
4. Step 4: Simplify right side
   6,429,864x = 76,674,330,806,544
5. Step 5: Solve for x
   x = 76,674,330,806,544/6,429,864
6. Step 6: Final answer
   x = 11,924,720.46