Finding the Third Proportional to 188,136 and 402,498

Step by Step Solution

1. Step 1: Write the proportion equation
   188,136 : 402,498 = 402,498 : x
2. Step 2: Convert to fraction form
   188,136/402,498 = 402,498/x
3. Step 3: Cross multiply
   188,136x = 402,498 × 402,498
4. Step 4: Simplify right side
   188,136x = 162,004,640,004
5. Step 5: Solve for x
   x = 162,004,640,004/188,136
6. Step 6: Final answer
   x = 861,103.88