Finding the Fourth Proportional to 2,660.22, 3,990.31 and 1,269.35

Step by Step Solution

1. Step 1: Write the proportion equation
   2,660.22 : 3,990.31 = 1,269.35 : x
2. Step 2: Convert to fraction form
   2,660.22/3,990.31 = 1,269.35/x
3. Step 3: Cross multiply
   2,660.22x = 3,990.31 × 1,269.35
4. Step 4: Simplify right side
   2,660.22x = 5,065,100.00
5. Step 5: Solve for x
   x = 5,065,100.00/2,660.22
6. Step 6: Final answer
   x = 1,904.02