Finding the Fourth Proportional to 2,261.51, 3,120.69 and 1,266.73

Step by Step Solution

1. Step 1: Write the proportion equation
   2,261.51 : 3,120.69 = 1,266.73 : x
2. Step 2: Convert to fraction form
   2,261.51/3,120.69 = 1,266.73/x
3. Step 3: Cross multiply
   2,261.51x = 3,120.69 × 1,266.73
4. Step 4: Simplify right side
   2,261.51x = 3,953,071.64
5. Step 5: Solve for x
   x = 3,953,071.64/2,261.51
6. Step 6: Final answer
   x = 1,747.98