Finding the Third Proportional to 405,096 and 872,520

Step by Step Solution

1. Step 1: Write the proportion equation
   405,096 : 872,520 = 872,520 : x
2. Step 2: Convert to fraction form
   405,096/872,520 = 872,520/x
3. Step 3: Cross multiply
   405,096x = 872,520 × 872,520
4. Step 4: Simplify right side
   405,096x = 761,291,150,400
5. Step 5: Solve for x
   x = 761,291,150,400/405,096
6. Step 6: Final answer
   x = 1,879,285.78