Finding the Fourth Proportional to 2,661.25, 3,991.71 and 1,017.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,661.25 : 3,991.71 = 1,017.05 : x
2. Step 2: Convert to fraction form
   2,661.25/3,991.71 = 1,017.05/x
3. Step 3: Cross multiply
   2,661.25x = 3,991.71 × 1,017.05
4. Step 4: Simplify right side
   2,661.25x = 4,059,748.70
5. Step 5: Solve for x
   x = 4,059,748.70/2,661.25
6. Step 6: Final answer
   x = 1,525.51