Finding the Fourth Proportional to 3,665.15, 5,499.55 and 1,717.51

Step by Step Solution

1. Step 1: Write the proportion equation
   3,665.15 : 5,499.55 = 1,717.51 : x
2. Step 2: Convert to fraction form
   3,665.15/5,499.55 = 1,717.51/x
3. Step 3: Cross multiply
   3,665.15x = 5,499.55 × 1,717.51
4. Step 4: Simplify right side
   3,665.15x = 9,445,504.62
5. Step 5: Solve for x
   x = 9,445,504.62/3,665.15
6. Step 6: Final answer
   x = 2,577.11