Finding the Fourth Proportional to 2,021.16, 2,789.63 and 1,137.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,021.16 : 2,789.63 = 1,137.25 : x
2. Step 2: Convert to fraction form
   2,021.16/2,789.63 = 1,137.25/x
3. Step 3: Cross multiply
   2,021.16x = 2,789.63 × 1,137.25
4. Step 4: Simplify right side
   2,021.16x = 3,172,506.72
5. Step 5: Solve for x
   x = 3,172,506.72/2,021.16
6. Step 6: Final answer
   x = 1,569.65