Finding the Third Proportional to 434,672 and 921,680

Step by Step Solution

1. Step 1: Write the proportion equation
   434,672 : 921,680 = 921,680 : x
2. Step 2: Convert to fraction form
   434,672/921,680 = 921,680/x
3. Step 3: Cross multiply
   434,672x = 921,680 × 921,680
4. Step 4: Simplify right side
   434,672x = 849,494,022,400
5. Step 5: Solve for x
   x = 849,494,022,400/434,672
6. Step 6: Final answer
   x = 1,954,333.43