Finding the Fourth Proportional to 2,021.89, 2,790.04 and 1,137.53

Step by Step Solution

1. Step 1: Write the proportion equation
   2,021.89 : 2,790.04 = 1,137.53 : x
2. Step 2: Convert to fraction form
   2,021.89/2,790.04 = 1,137.53/x
3. Step 3: Cross multiply
   2,021.89x = 2,790.04 × 1,137.53
4. Step 4: Simplify right side
   2,021.89x = 3,173,734.56
5. Step 5: Solve for x
   x = 3,173,734.56/2,021.89
6. Step 6: Final answer
   x = 1,569.69