Finding the Third Proportional to 5,415,644 and 8,412,696

Step by Step Solution

1. Step 1: Write the proportion equation
   5,415,644 : 8,412,696 = 8,412,696 : x
2. Step 2: Convert to fraction form
   5,415,644/8,412,696 = 8,412,696/x
3. Step 3: Cross multiply
   5,415,644x = 8,412,696 × 8,412,696
4. Step 4: Simplify right side
   5,415,644x = 70,773,453,988,416
5. Step 5: Solve for x
   x = 70,773,453,988,416/5,415,644
6. Step 6: Final answer
   x = 13,068,335.73