Finding the Fourth Proportional to 2,261.57, 3,120.84 and 1,253.22

Step by Step Solution

1. Step 1: Write the proportion equation
   2,261.57 : 3,120.84 = 1,253.22 : x
2. Step 2: Convert to fraction form
   2,261.57/3,120.84 = 1,253.22/x
3. Step 3: Cross multiply
   2,261.57x = 3,120.84 × 1,253.22
4. Step 4: Simplify right side
   2,261.57x = 3,911,099.10
5. Step 5: Solve for x
   x = 3,911,099.10/2,261.57
6. Step 6: Final answer
   x = 1,729.37