Finding the Third Proportional to 5,269,665 and 7,860,780

Step by Step Solution

1. Step 1: Write the proportion equation
   5,269,665 : 7,860,780 = 7,860,780 : x
2. Step 2: Convert to fraction form
   5,269,665/7,860,780 = 7,860,780/x
3. Step 3: Cross multiply
   5,269,665x = 7,860,780 × 7,860,780
4. Step 4: Simplify right side
   5,269,665x = 61,791,862,208,400
5. Step 5: Solve for x
   x = 61,791,862,208,400/5,269,665
6. Step 6: Final answer
   x = 11,725,956.43