Finding the Third Proportional to 677,978 and 1,025,715

Step by Step Solution

1. Step 1: Write the proportion equation
   677,978 : 1,025,715 = 1,025,715 : x
2. Step 2: Convert to fraction form
   677,978/1,025,715 = 1,025,715/x
3. Step 3: Cross multiply
   677,978x = 1,025,715 × 1,025,715
4. Step 4: Simplify right side
   677,978x = 1,052,091,261,225
5. Step 5: Solve for x
   x = 1,052,091,261,225/677,978
6. Step 6: Final answer
   x = 1,551,807.38