Finding the Third Proportional to 404,352 and 616,320

Step by Step Solution

1. Step 1: Write the proportion equation
   404,352 : 616,320 = 616,320 : x
2. Step 2: Convert to fraction form
   404,352/616,320 = 616,320/x
3. Step 3: Cross multiply
   404,352x = 616,320 × 616,320
4. Step 4: Simplify right side
   404,352x = 379,850,342,400
5. Step 5: Solve for x
   x = 379,850,342,400/404,352
6. Step 6: Final answer
   x = 939,405.13