Finding the Fourth Proportional to 2,228.21, 3,074.72 and 1,331.77

Step by Step Solution

1. Step 1: Write the proportion equation
   2,228.21 : 3,074.72 = 1,331.77 : x
2. Step 2: Convert to fraction form
   2,228.21/3,074.72 = 1,331.77/x
3. Step 3: Cross multiply
   2,228.21x = 3,074.72 × 1,331.77
4. Step 4: Simplify right side
   2,228.21x = 4,094,797.82
5. Step 5: Solve for x
   x = 4,094,797.82/2,228.21
6. Step 6: Final answer
   x = 1,837.71