Finding the Third Proportional to 423,942 and 921,510

Step by Step Solution

1. Step 1: Write the proportion equation
   423,942 : 921,510 = 921,510 : x
2. Step 2: Convert to fraction form
   423,942/921,510 = 921,510/x
3. Step 3: Cross multiply
   423,942x = 921,510 × 921,510
4. Step 4: Simplify right side
   423,942x = 849,180,680,100
5. Step 5: Solve for x
   x = 849,180,680,100/423,942
6. Step 6: Final answer
   x = 2,003,058.63