Finding the Third Proportional to 12,171,217 and 25,700,555

Step by Step Solution

1. Step 1: Write the proportion equation
   12,171,217 : 25,700,555 = 25,700,555 : x
2. Step 2: Convert to fraction form
   12,171,217/25,700,555 = 25,700,555/x
3. Step 3: Cross multiply
   12,171,217x = 25,700,555 × 25,700,555
4. Step 4: Simplify right side
   12,171,217x = 660,518,527,308,025
5. Step 5: Solve for x
   x = 660,518,527,308,025/12,171,217
6. Step 6: Final answer
   x = 54,268,897.46