Finding the Third Proportional to 187,440 and 404,406

Step by Step Solution

1. Step 1: Write the proportion equation
   187,440 : 404,406 = 404,406 : x
2. Step 2: Convert to fraction form
   187,440/404,406 = 404,406/x
3. Step 3: Cross multiply
   187,440x = 404,406 × 404,406
4. Step 4: Simplify right side
   187,440x = 163,544,212,836
5. Step 5: Solve for x
   x = 163,544,212,836/187,440
6. Step 6: Final answer
   x = 872,515.01