Finding the Third Proportional to 407,672 and 864,680

Step by Step Solution

1. Step 1: Write the proportion equation
   407,672 : 864,680 = 864,680 : x
2. Step 2: Convert to fraction form
   407,672/864,680 = 864,680/x
3. Step 3: Cross multiply
   407,672x = 864,680 × 864,680
4. Step 4: Simplify right side
   407,672x = 747,671,502,400
5. Step 5: Solve for x
   x = 747,671,502,400/407,672
6. Step 6: Final answer
   x = 1,834,002.59