Finding the Fourth Proportional to 2,021.56, 2,790.54 and 1,275.37

Step by Step Solution

1. Step 1: Write the proportion equation
   2,021.56 : 2,790.54 = 1,275.37 : x
2. Step 2: Convert to fraction form
   2,021.56/2,790.54 = 1,275.37/x
3. Step 3: Cross multiply
   2,021.56x = 2,790.54 × 1,275.37
4. Step 4: Simplify right side
   2,021.56x = 3,558,971.00
5. Step 5: Solve for x
   x = 3,558,971.00/2,021.56
6. Step 6: Final answer
   x = 1,760.51