Finding the Fourth Proportional to 2,021.67, 2,789.69 and 1,137.47

Step by Step Solution

1. Step 1: Write the proportion equation
   2,021.67 : 2,789.69 = 1,137.47 : x
2. Step 2: Convert to fraction form
   2,021.67/2,789.69 = 1,137.47/x
3. Step 3: Cross multiply
   2,021.67x = 2,789.69 × 1,137.47
4. Step 4: Simplify right side
   2,021.67x = 3,173,169.05
5. Step 5: Solve for x
   x = 3,173,169.05/2,021.67
6. Step 6: Final answer
   x = 1,569.58