Finding the Third Proportional to 187,490 and 404,446

Step by Step Solution

1. Step 1: Write the proportion equation
   187,490 : 404,446 = 404,446 : x
2. Step 2: Convert to fraction form
   187,490/404,446 = 404,446/x
3. Step 3: Cross multiply
   187,490x = 404,446 × 404,446
4. Step 4: Simplify right side
   187,490x = 163,576,566,916
5. Step 5: Solve for x
   x = 163,576,566,916/187,490
6. Step 6: Final answer
   x = 872,454.89