Finding the Third Proportional to 4,128,234 and 8,787,910

Step by Step Solution

1. Step 1: Write the proportion equation
   4,128,234 : 8,787,910 = 8,787,910 : x
2. Step 2: Convert to fraction form
   4,128,234/8,787,910 = 8,787,910/x
3. Step 3: Cross multiply
   4,128,234x = 8,787,910 × 8,787,910
4. Step 4: Simplify right side
   4,128,234x = 77,227,362,168,100
5. Step 5: Solve for x
   x = 77,227,362,168,100/4,128,234
6. Step 6: Final answer
   x = 18,707,118.39