Finding the Fourth Proportional to 2,228.56, 3,075.60 and 1,297.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,228.56 : 3,075.60 = 1,297.12 : x
2. Step 2: Convert to fraction form
   2,228.56/3,075.60 = 1,297.12/x
3. Step 3: Cross multiply
   2,228.56x = 3,075.60 × 1,297.12
4. Step 4: Simplify right side
   2,228.56x = 3,989,422.27
5. Step 5: Solve for x
   x = 3,989,422.27/2,228.56
6. Step 6: Final answer
   x = 1,790.13