Finding the Third Proportional to 188,428 and 404,156

Step by Step Solution

1. Step 1: Write the proportion equation
   188,428 : 404,156 = 404,156 : x
2. Step 2: Convert to fraction form
   188,428/404,156 = 404,156/x
3. Step 3: Cross multiply
   188,428x = 404,156 × 404,156
4. Step 4: Simplify right side
   188,428x = 163,342,072,336
5. Step 5: Solve for x
   x = 163,342,072,336/188,428
6. Step 6: Final answer
   x = 866,867.30