Finding the Third Proportional to 5,617,818 and 8,485,761

Step by Step Solution

1. Step 1: Write the proportion equation
   5,617,818 : 8,485,761 = 8,485,761 : x
2. Step 2: Convert to fraction form
   5,617,818/8,485,761 = 8,485,761/x
3. Step 3: Cross multiply
   5,617,818x = 8,485,761 × 8,485,761
4. Step 4: Simplify right side
   5,617,818x = 72,008,139,749,121
5. Step 5: Solve for x
   x = 72,008,139,749,121/5,617,818
6. Step 6: Final answer
   x = 12,817,812.85