Finding the Fourth Proportional to 2,075.10, 3,111.09 and 1,253.21

Step by Step Solution

1. Step 1: Write the proportion equation
   2,075.10 : 3,111.09 = 1,253.21 : x
2. Step 2: Convert to fraction form
   2,075.10/3,111.09 = 1,253.21/x
3. Step 3: Cross multiply
   2,075.10x = 3,111.09 × 1,253.21
4. Step 4: Simplify right side
   2,075.10x = 3,898,833.54
5. Step 5: Solve for x
   x = 3,898,833.54/2,075.10
6. Step 6: Final answer
   x = 1,878.87