Finding the Fourth Proportional to 3,663.59, 5,055.76 and 2,172.24

Step by Step Solution

1. Step 1: Write the proportion equation
   3,663.59 : 5,055.76 = 2,172.24 : x
2. Step 2: Convert to fraction form
   3,663.59/5,055.76 = 2,172.24/x
3. Step 3: Cross multiply
   3,663.59x = 5,055.76 × 2,172.24
4. Step 4: Simplify right side
   3,663.59x = 10,982,324.10
5. Step 5: Solve for x
   x = 10,982,324.10/3,663.59
6. Step 6: Final answer
   x = 2,997.69