Finding the Third Proportional to 422,976 and 915,648

Step by Step Solution

1. Step 1: Write the proportion equation
   422,976 : 915,648 = 915,648 : x
2. Step 2: Convert to fraction form
   422,976/915,648 = 915,648/x
3. Step 3: Cross multiply
   422,976x = 915,648 × 915,648
4. Step 4: Simplify right side
   422,976x = 838,411,259,904
5. Step 5: Solve for x
   x = 838,411,259,904/422,976
6. Step 6: Final answer
   x = 1,982,172.18