Finding the Third Proportional to 189,290 and 404,845

Step by Step Solution

1. Step 1: Write the proportion equation
   189,290 : 404,845 = 404,845 : x
2. Step 2: Convert to fraction form
   189,290/404,845 = 404,845/x
3. Step 3: Cross multiply
   189,290x = 404,845 × 404,845
4. Step 4: Simplify right side
   189,290x = 163,899,474,025
5. Step 5: Solve for x
   x = 163,899,474,025/189,290
6. Step 6: Final answer
   x = 865,864.41