Finding the Fourth Proportional to 1,660.86, 2,291.37 and 1,071.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,660.86 : 2,291.37 = 1,071.18 : x
2. Step 2: Convert to fraction form
   1,660.86/2,291.37 = 1,071.18/x
3. Step 3: Cross multiply
   1,660.86x = 2,291.37 × 1,071.18
4. Step 4: Simplify right side
   1,660.86x = 2,454,469.72
5. Step 5: Solve for x
   x = 2,454,469.72/1,660.86
6. Step 6: Final answer
   x = 1,477.83