Finding the Fourth Proportional to 1,405,510, 2,108,323.34 and 408,238

Step by Step Solution

1. Step 1: Write the proportion equation
   1,405,510 : 2,108,323.34 = 408,238 : x
2. Step 2: Convert to fraction form
   1,405,510/2,108,323.34 = 408,238/x
3. Step 3: Cross multiply
   1,405,510x = 2,108,323.34 × 408,238
4. Step 4: Simplify right side
   1,405,510x = 860,697,703,674.92
5. Step 5: Solve for x
   x = 860,697,703,674.92/1,405,510
6. Step 6: Final answer
   x = 612,373.95