Finding the Fourth Proportional to 2,022, 2,789.70 and 1,225.07

Step by Step Solution

1. Step 1: Write the proportion equation
   2,022 : 2,789.70 = 1,225.07 : x
2. Step 2: Convert to fraction form
   2,022/2,789.70 = 1,225.07/x
3. Step 3: Cross multiply
   2,022x = 2,789.70 × 1,225.07
4. Step 4: Simplify right side
   2,022x = 3,417,563.83
5. Step 5: Solve for x
   x = 3,417,563.83/2,022
6. Step 6: Final answer
   x = 1,690.19