Finding the Fourth Proportional to 2,261.89, 3,121.42 and 1,267.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,261.89 : 3,121.42 = 1,267.10 : x
2. Step 2: Convert to fraction form
   2,261.89/3,121.42 = 1,267.10/x
3. Step 3: Cross multiply
   2,261.89x = 3,121.42 × 1,267.10
4. Step 4: Simplify right side
   2,261.89x = 3,955,132.51
5. Step 5: Solve for x
   x = 3,955,132.51/2,261.89
6. Step 6: Final answer
   x = 1,748.60