Finding the Fourth Proportional to 2,021.34, 2,789.35 and 1,137.22

Step by Step Solution

1. Step 1: Write the proportion equation
   2,021.34 : 2,789.35 = 1,137.22 : x
2. Step 2: Convert to fraction form
   2,021.34/2,789.35 = 1,137.22/x
3. Step 3: Cross multiply
   2,021.34x = 2,789.35 × 1,137.22
4. Step 4: Simplify right side
   2,021.34x = 3,172,104.61
5. Step 5: Solve for x
   x = 3,172,104.61/2,021.34
6. Step 6: Final answer
   x = 1,569.31