Finding the Fourth Proportional to 1,661.86, 2,494.59 and 1,405.04

Step by Step Solution

1. Step 1: Write the proportion equation
   1,661.86 : 2,494.59 = 1,405.04 : x
2. Step 2: Convert to fraction form
   1,661.86/2,494.59 = 1,405.04/x
3. Step 3: Cross multiply
   1,661.86x = 2,494.59 × 1,405.04
4. Step 4: Simplify right side
   1,661.86x = 3,504,998.73
5. Step 5: Solve for x
   x = 3,504,998.73/1,661.86
6. Step 6: Final answer
   x = 2,109.08