Finding the Fourth Proportional to 2,021.94, 2,789.58 and 1,225.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,021.94 : 2,789.58 = 1,225.52 : x
2. Step 2: Convert to fraction form
   2,021.94/2,789.58 = 1,225.52/x
3. Step 3: Cross multiply
   2,021.94x = 2,789.58 × 1,225.52
4. Step 4: Simplify right side
   2,021.94x = 3,418,686.08
5. Step 5: Solve for x
   x = 3,418,686.08/2,021.94
6. Step 6: Final answer
   x = 1,690.80