Finding the Third Proportional to 2,157,806.25 and 3,221,939.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,157,806.25 : 3,221,939.25 = 3,221,939.25 : x
2. Step 2: Convert to fraction form
   2,157,806.25/3,221,939.25 = 3,221,939.25/x
3. Step 3: Cross multiply
   2,157,806.25x = 3,221,939.25 × 3,221,939.25
4. Step 4: Simplify right side
   2,157,806.25x = 10,380,892,530,690.56
5. Step 5: Solve for x
   x = 10,380,892,530,690.56/2,157,806.25
6. Step 6: Final answer
   x = 4,810,854.79