Finding the Fourth Proportional to 2,255.81, 3,113.30 and 1,261.46

Step by Step Solution

1. Step 1: Write the proportion equation
   2,255.81 : 3,113.30 = 1,261.46 : x
2. Step 2: Convert to fraction form
   2,255.81/3,113.30 = 1,261.46/x
3. Step 3: Cross multiply
   2,255.81x = 3,113.30 × 1,261.46
4. Step 4: Simplify right side
   2,255.81x = 3,927,314.35
5. Step 5: Solve for x
   x = 3,927,314.35/2,255.81
6. Step 6: Final answer
   x = 1,740.98