Finding the Third Proportional to 191,316 and 404,508

Step by Step Solution

1. Step 1: Write the proportion equation
   191,316 : 404,508 = 404,508 : x
2. Step 2: Convert to fraction form
   191,316/404,508 = 404,508/x
3. Step 3: Cross multiply
   191,316x = 404,508 × 404,508
4. Step 4: Simplify right side
   191,316x = 163,626,722,064
5. Step 5: Solve for x
   x = 163,626,722,064/191,316
6. Step 6: Final answer
   x = 855,269.41