Finding the Fourth Proportional to 2,260.89, 3,120.30 and 1,265.98

Step by Step Solution

1. Step 1: Write the proportion equation
   2,260.89 : 3,120.30 = 1,265.98 : x
2. Step 2: Convert to fraction form
   2,260.89/3,120.30 = 1,265.98/x
3. Step 3: Cross multiply
   2,260.89x = 3,120.30 × 1,265.98
4. Step 4: Simplify right side
   2,260.89x = 3,950,224.85
5. Step 5: Solve for x
   x = 3,950,224.85/2,260.89
6. Step 6: Final answer
   x = 1,747.20