Finding the Third Proportional to 186,312 and 404,131

Step by Step Solution

1. Step 1: Write the proportion equation
   186,312 : 404,131 = 404,131 : x
2. Step 2: Convert to fraction form
   186,312/404,131 = 404,131/x
3. Step 3: Cross multiply
   186,312x = 404,131 × 404,131
4. Step 4: Simplify right side
   186,312x = 163,321,865,161
5. Step 5: Solve for x
   x = 163,321,865,161/186,312
6. Step 6: Final answer
   x = 876,604.11