Finding the Fourth Proportional to 2,261.57, 3,120.98 and 1,266.85

Step by Step Solution

1. Step 1: Write the proportion equation
   2,261.57 : 3,120.98 = 1,266.85 : x
2. Step 2: Convert to fraction form
   2,261.57/3,120.98 = 1,266.85/x
3. Step 3: Cross multiply
   2,261.57x = 3,120.98 × 1,266.85
4. Step 4: Simplify right side
   2,261.57x = 3,953,814.77
5. Step 5: Solve for x
   x = 3,953,814.77/2,261.57
6. Step 6: Final answer
   x = 1,748.26