Finding the Fourth Proportional to 2,021.50, 2,789.80 and 1,225.37

Step by Step Solution

1. Step 1: Write the proportion equation
   2,021.50 : 2,789.80 = 1,225.37 : x
2. Step 2: Convert to fraction form
   2,021.50/2,789.80 = 1,225.37/x
3. Step 3: Cross multiply
   2,021.50x = 2,789.80 × 1,225.37
4. Step 4: Simplify right side
   2,021.50x = 3,418,537.23
5. Step 5: Solve for x
   x = 3,418,537.23/2,021.50
6. Step 6: Final answer
   x = 1,691.09