Finding the Fourth Proportional to 2,021.60, 2,789.76 and 1,322.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,021.60 : 2,789.76 = 1,322.96 : x
2. Step 2: Convert to fraction form
   2,021.60/2,789.76 = 1,322.96/x
3. Step 3: Cross multiply
   2,021.60x = 2,789.76 × 1,322.96
4. Step 4: Simplify right side
   2,021.60x = 3,690,740.89
5. Step 5: Solve for x
   x = 3,690,740.89/2,021.60
6. Step 6: Final answer
   x = 1,825.65