Finding the Fourth Proportional to 2,261.45, 3,120.71 and 1,266.73

Step by Step Solution

1. Step 1: Write the proportion equation
   2,261.45 : 3,120.71 = 1,266.73 : x
2. Step 2: Convert to fraction form
   2,261.45/3,120.71 = 1,266.73/x
3. Step 3: Cross multiply
   2,261.45x = 3,120.71 × 1,266.73
4. Step 4: Simplify right side
   2,261.45x = 3,953,082.84
5. Step 5: Solve for x
   x = 3,953,082.84/2,261.45
6. Step 6: Final answer
   x = 1,748.03