Finding the Fourth Proportional to 1,665.55, 2,498.82 and 495.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,665.55 : 2,498.82 = 495.59 : x
2. Step 2: Convert to fraction form
   1,665.55/2,498.82 = 495.59/x
3. Step 3: Cross multiply
   1,665.55x = 2,498.82 × 495.59
4. Step 4: Simplify right side
   1,665.55x = 1,238,375.23
5. Step 5: Solve for x
   x = 1,238,375.23/1,665.55
6. Step 6: Final answer
   x = 743.53