Finding the Third Proportional to 786,978 and 1,720,759

Step by Step Solution

1. Step 1: Write the proportion equation
   786,978 : 1,720,759 = 1,720,759 : x
2. Step 2: Convert to fraction form
   786,978/1,720,759 = 1,720,759/x
3. Step 3: Cross multiply
   786,978x = 1,720,759 × 1,720,759
4. Step 4: Simplify right side
   786,978x = 2,961,011,536,081
5. Step 5: Solve for x
   x = 2,961,011,536,081/786,978
6. Step 6: Final answer
   x = 3,762,508.65