Finding the Third Proportional to 4,142,457 and 8,860,642

Step by Step Solution

1. Step 1: Write the proportion equation
   4,142,457 : 8,860,642 = 8,860,642 : x
2. Step 2: Convert to fraction form
   4,142,457/8,860,642 = 8,860,642/x
3. Step 3: Cross multiply
   4,142,457x = 8,860,642 × 8,860,642
4. Step 4: Simplify right side
   4,142,457x = 78,510,976,652,164
5. Step 5: Solve for x
   x = 78,510,976,652,164/4,142,457
6. Step 6: Final answer
   x = 18,952,755.97