Finding the Third Proportional to 4,972,766 and 7,678,820

Step by Step Solution

1. Step 1: Write the proportion equation
   4,972,766 : 7,678,820 = 7,678,820 : x
2. Step 2: Convert to fraction form
   4,972,766/7,678,820 = 7,678,820/x
3. Step 3: Cross multiply
   4,972,766x = 7,678,820 × 7,678,820
4. Step 4: Simplify right side
   4,972,766x = 58,964,276,592,400
5. Step 5: Solve for x
   x = 58,964,276,592,400/4,972,766
6. Step 6: Final answer
   x = 11,857,440.42