Finding the Third Proportional to 5,258,704 and 8,220,207

Step by Step Solution

1. Step 1: Write the proportion equation
   5,258,704 : 8,220,207 = 8,220,207 : x
2. Step 2: Convert to fraction form
   5,258,704/8,220,207 = 8,220,207/x
3. Step 3: Cross multiply
   5,258,704x = 8,220,207 × 8,220,207
4. Step 4: Simplify right side
   5,258,704x = 67,571,803,122,849
5. Step 5: Solve for x
   x = 67,571,803,122,849/5,258,704
6. Step 6: Final answer
   x = 12,849,516.37