Finding the Third Proportional to 4,040,140 and 8,721,256

Step by Step Solution

1. Step 1: Write the proportion equation
   4,040,140 : 8,721,256 = 8,721,256 : x
2. Step 2: Convert to fraction form
   4,040,140/8,721,256 = 8,721,256/x
3. Step 3: Cross multiply
   4,040,140x = 8,721,256 × 8,721,256
4. Step 4: Simplify right side
   4,040,140x = 76,060,306,217,536
5. Step 5: Solve for x
   x = 76,060,306,217,536/4,040,140
6. Step 6: Final answer
   x = 18,826,156.08