Finding the Third Proportional to 647,538 and 1,373,978

Step by Step Solution

1. Step 1: Write the proportion equation
   647,538 : 1,373,978 = 1,373,978 : x
2. Step 2: Convert to fraction form
   647,538/1,373,978 = 1,373,978/x
3. Step 3: Cross multiply
   647,538x = 1,373,978 × 1,373,978
4. Step 4: Simplify right side
   647,538x = 1,887,815,544,484
5. Step 5: Solve for x
   x = 1,887,815,544,484/647,538
6. Step 6: Final answer
   x = 2,915,374.15