Finding the Fourth Proportional to 3,669.82, 5,505.17 and 1,721.57

Step by Step Solution

1. Step 1: Write the proportion equation
   3,669.82 : 5,505.17 = 1,721.57 : x
2. Step 2: Convert to fraction form
   3,669.82/5,505.17 = 1,721.57/x
3. Step 3: Cross multiply
   3,669.82x = 5,505.17 × 1,721.57
4. Step 4: Simplify right side
   3,669.82x = 9,477,499.38
5. Step 5: Solve for x
   x = 9,477,499.38/3,669.82
6. Step 6: Final answer
   x = 2,582.55