Finding the Third Proportional to 7,872,245 and 12,854,667

Step by Step Solution

1. Step 1: Write the proportion equation
   7,872,245 : 12,854,667 = 12,854,667 : x
2. Step 2: Convert to fraction form
   7,872,245/12,854,667 = 12,854,667/x
3. Step 3: Cross multiply
   7,872,245x = 12,854,667 × 12,854,667
4. Step 4: Simplify right side
   7,872,245x = 165,242,463,680,889
5. Step 5: Solve for x
   x = 165,242,463,680,889/7,872,245
6. Step 6: Final answer
   x = 20,990,513.34