Finding the Third Proportional to 188,422 and 404,142

Step by Step Solution

1. Step 1: Write the proportion equation
   188,422 : 404,142 = 404,142 : x
2. Step 2: Convert to fraction form
   188,422/404,142 = 404,142/x
3. Step 3: Cross multiply
   188,422x = 404,142 × 404,142
4. Step 4: Simplify right side
   188,422x = 163,330,756,164
5. Step 5: Solve for x
   x = 163,330,756,164/188,422
6. Step 6: Final answer
   x = 866,834.85