Finding the Third Proportional to 4,063,653 and 8,687,178

Step by Step Solution

1. Step 1: Write the proportion equation
   4,063,653 : 8,687,178 = 8,687,178 : x
2. Step 2: Convert to fraction form
   4,063,653/8,687,178 = 8,687,178/x
3. Step 3: Cross multiply
   4,063,653x = 8,687,178 × 8,687,178
4. Step 4: Simplify right side
   4,063,653x = 75,467,061,603,684
5. Step 5: Solve for x
   x = 75,467,061,603,684/4,063,653
6. Step 6: Final answer
   x = 18,571,236.67