Finding the Fourth Proportional to 2,021.82, 2,790.10 and 1,125.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,021.82 : 2,790.10 = 1,125.55 : x
2. Step 2: Convert to fraction form
   2,021.82/2,790.10 = 1,125.55/x
3. Step 3: Cross multiply
   2,021.82x = 2,790.10 × 1,125.55
4. Step 4: Simplify right side
   2,021.82x = 3,140,401.95
5. Step 5: Solve for x
   x = 3,140,401.95/2,021.82
6. Step 6: Final answer
   x = 1,553.26