Finding the Third Proportional to 428,022 and 911,340

Step by Step Solution

1. Step 1: Write the proportion equation
   428,022 : 911,340 = 911,340 : x
2. Step 2: Convert to fraction form
   428,022/911,340 = 911,340/x
3. Step 3: Cross multiply
   428,022x = 911,340 × 911,340
4. Step 4: Simplify right side
   428,022x = 830,540,595,600
5. Step 5: Solve for x
   x = 830,540,595,600/428,022
6. Step 6: Final answer
   x = 1,940,415.67