Finding the Third Proportional to 2,188,171.50 and 3,515,805

Step by Step Solution

1. Step 1: Write the proportion equation
   2,188,171.50 : 3,515,805 = 3,515,805 : x
2. Step 2: Convert to fraction form
   2,188,171.50/3,515,805 = 3,515,805/x
3. Step 3: Cross multiply
   2,188,171.50x = 3,515,805 × 3,515,805
4. Step 4: Simplify right side
   2,188,171.50x = 12,360,884,798,025
5. Step 5: Solve for x
   x = 12,360,884,798,025/2,188,171.50
6. Step 6: Final answer
   x = 5,648,956.13