Finding the Third Proportional to 7,766,448 and 12,156,600

Step by Step Solution

1. Step 1: Write the proportion equation
   7,766,448 : 12,156,600 = 12,156,600 : x
2. Step 2: Convert to fraction form
   7,766,448/12,156,600 = 12,156,600/x
3. Step 3: Cross multiply
   7,766,448x = 12,156,600 × 12,156,600
4. Step 4: Simplify right side
   7,766,448x = 147,782,923,560,000
5. Step 5: Solve for x
   x = 147,782,923,560,000/7,766,448
6. Step 6: Final answer
   x = 19,028,379.97