Finding the Third Proportional to 410,354 and 613,890

Step by Step Solution

1. Step 1: Write the proportion equation
   410,354 : 613,890 = 613,890 : x
2. Step 2: Convert to fraction form
   410,354/613,890 = 613,890/x
3. Step 3: Cross multiply
   410,354x = 613,890 × 613,890
4. Step 4: Simplify right side
   410,354x = 376,860,932,100
5. Step 5: Solve for x
   x = 376,860,932,100/410,354
6. Step 6: Final answer
   x = 918,380.06