Finding the Third Proportional to 188,436 and 404,172

Step by Step Solution

1. Step 1: Write the proportion equation
   188,436 : 404,172 = 404,172 : x
2. Step 2: Convert to fraction form
   188,436/404,172 = 404,172/x
3. Step 3: Cross multiply
   188,436x = 404,172 × 404,172
4. Step 4: Simplify right side
   188,436x = 163,355,005,584
5. Step 5: Solve for x
   x = 163,355,005,584/188,436
6. Step 6: Final answer
   x = 866,899.14