Finding the Third Proportional to 3,972,167 and 8,421,025

Step by Step Solution

1. Step 1: Write the proportion equation
   3,972,167 : 8,421,025 = 8,421,025 : x
2. Step 2: Convert to fraction form
   3,972,167/8,421,025 = 8,421,025/x
3. Step 3: Cross multiply
   3,972,167x = 8,421,025 × 8,421,025
4. Step 4: Simplify right side
   3,972,167x = 70,913,662,050,625
5. Step 5: Solve for x
   x = 70,913,662,050,625/3,972,167
6. Step 6: Final answer
   x = 17,852,638.64