Finding the Third Proportional to 397,000 and 863,978

Step by Step Solution

1. Step 1: Write the proportion equation
   397,000 : 863,978 = 863,978 : x
2. Step 2: Convert to fraction form
   397,000/863,978 = 863,978/x
3. Step 3: Cross multiply
   397,000x = 863,978 × 863,978
4. Step 4: Simplify right side
   397,000x = 746,457,984,484
5. Step 5: Solve for x
   x = 746,457,984,484/397,000
6. Step 6: Final answer
   x = 1,880,246.81