Finding the Fourth Proportional to 3,663.09, 5,055.07 and 2,171.74

Step by Step Solution

1. Step 1: Write the proportion equation
   3,663.09 : 5,055.07 = 2,171.74 : x
2. Step 2: Convert to fraction form
   3,663.09/5,055.07 = 2,171.74/x
3. Step 3: Cross multiply
   3,663.09x = 5,055.07 × 2,171.74
4. Step 4: Simplify right side
   3,663.09x = 10,978,297.72
5. Step 5: Solve for x
   x = 10,978,297.72/3,663.09
6. Step 6: Final answer
   x = 2,997.00