Finding the Third Proportional to 4,142,220 and 8,860,134

Step by Step Solution

1. Step 1: Write the proportion equation
   4,142,220 : 8,860,134 = 8,860,134 : x
2. Step 2: Convert to fraction form
   4,142,220/8,860,134 = 8,860,134/x
3. Step 3: Cross multiply
   4,142,220x = 8,860,134 × 8,860,134
4. Step 4: Simplify right side
   4,142,220x = 78,501,974,497,956
5. Step 5: Solve for x
   x = 78,501,974,497,956/4,142,220
6. Step 6: Final answer
   x = 18,951,667.10