Finding the Third Proportional to 397,321 and 868,916

Step by Step Solution

1. Step 1: Write the proportion equation
   397,321 : 868,916 = 868,916 : x
2. Step 2: Convert to fraction form
   397,321/868,916 = 868,916/x
3. Step 3: Cross multiply
   397,321x = 868,916 × 868,916
4. Step 4: Simplify right side
   397,321x = 755,015,015,056
5. Step 5: Solve for x
   x = 755,015,015,056/397,321
6. Step 6: Final answer
   x = 1,900,264.56