Finding the Fourth Proportional to 1,666.40, 2,498.61 and 1,017.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,666.40 : 2,498.61 = 1,017.59 : x
2. Step 2: Convert to fraction form
   1,666.40/2,498.61 = 1,017.59/x
3. Step 3: Cross multiply
   1,666.40x = 2,498.61 × 1,017.59
4. Step 4: Simplify right side
   1,666.40x = 2,542,560.55
5. Step 5: Solve for x
   x = 2,542,560.55/1,666.40
6. Step 6: Final answer
   x = 1,525.78