Finding the Third Proportional to 189,288 and 404,840.25

Step by Step Solution

1. Step 1: Write the proportion equation
   189,288 : 404,840.25 = 404,840.25 : x
2. Step 2: Convert to fraction form
   189,288/404,840.25 = 404,840.25/x
3. Step 3: Cross multiply
   189,288x = 404,840.25 × 404,840.25
4. Step 4: Simplify right side
   189,288x = 163,895,628,020.06
5. Step 5: Solve for x
   x = 163,895,628,020.06/189,288
6. Step 6: Final answer
   x = 865,853.24