Finding the Third Proportional to 189,316 and 404,900

Step by Step Solution

1. Step 1: Write the proportion equation
   189,316 : 404,900 = 404,900 : x
2. Step 2: Convert to fraction form
   189,316/404,900 = 404,900/x
3. Step 3: Cross multiply
   189,316x = 404,900 × 404,900
4. Step 4: Simplify right side
   189,316x = 163,944,010,000
5. Step 5: Solve for x
   x = 163,944,010,000/189,316
6. Step 6: Final answer
   x = 865,980.74