Finding the Third Proportional to 1,939,764 and 4,215,288

Step by Step Solution

1. Step 1: Write the proportion equation
   1,939,764 : 4,215,288 = 4,215,288 : x
2. Step 2: Convert to fraction form
   1,939,764/4,215,288 = 4,215,288/x
3. Step 3: Cross multiply
   1,939,764x = 4,215,288 × 4,215,288
4. Step 4: Simplify right side
   1,939,764x = 17,768,652,922,944
5. Step 5: Solve for x
   x = 17,768,652,922,944/1,939,764
6. Step 6: Final answer
   x = 9,160,213.78