Finding the Fourth Proportional to 2,661.34, 3,991.49 and 1,017.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,661.34 : 3,991.49 = 1,017.50 : x
2. Step 2: Convert to fraction form
   2,661.34/3,991.49 = 1,017.50/x
3. Step 3: Cross multiply
   2,661.34x = 3,991.49 × 1,017.50
4. Step 4: Simplify right side
   2,661.34x = 4,061,348.02
5. Step 5: Solve for x
   x = 4,061,348.02/2,661.34
6. Step 6: Final answer
   x = 1,526.05