Finding the Third Proportional to 5,128,611 and 8,121,024

Step by Step Solution

1. Step 1: Write the proportion equation
   5,128,611 : 8,121,024 = 8,121,024 : x
2. Step 2: Convert to fraction form
   5,128,611/8,121,024 = 8,121,024/x
3. Step 3: Cross multiply
   5,128,611x = 8,121,024 × 8,121,024
4. Step 4: Simplify right side
   5,128,611x = 65,951,030,808,576
5. Step 5: Solve for x
   x = 65,951,030,808,576/5,128,611
6. Step 6: Final answer
   x = 12,859,433.25