Finding the Fourth Proportional to 2,021.54, 2,789.72 and 1,137.35

Step by Step Solution

1. Step 1: Write the proportion equation
   2,021.54 : 2,789.72 = 1,137.35 : x
2. Step 2: Convert to fraction form
   2,021.54/2,789.72 = 1,137.35/x
3. Step 3: Cross multiply
   2,021.54x = 2,789.72 × 1,137.35
4. Step 4: Simplify right side
   2,021.54x = 3,172,882.55
5. Step 5: Solve for x
   x = 3,172,882.55/2,021.54
6. Step 6: Final answer
   x = 1,569.54