Finding the Fourth Proportional to 3,663.76, 5,055.06 and 2,171.56

Step by Step Solution

1. Step 1: Write the proportion equation
   3,663.76 : 5,055.06 = 2,171.56 : x
2. Step 2: Convert to fraction form
   3,663.76/5,055.06 = 2,171.56/x
3. Step 3: Cross multiply
   3,663.76x = 5,055.06 × 2,171.56
4. Step 4: Simplify right side
   3,663.76x = 10,977,366.09
5. Step 5: Solve for x
   x = 10,977,366.09/3,663.76
6. Step 6: Final answer
   x = 2,996.20