Finding the Third Proportional to 428,728 and 931,240

Step by Step Solution

1. Step 1: Write the proportion equation
   428,728 : 931,240 = 931,240 : x
2. Step 2: Convert to fraction form
   428,728/931,240 = 931,240/x
3. Step 3: Cross multiply
   428,728x = 931,240 × 931,240
4. Step 4: Simplify right side
   428,728x = 867,207,937,600
5. Step 5: Solve for x
   x = 867,207,937,600/428,728
6. Step 6: Final answer
   x = 2,022,746.21