Finding the Fourth Proportional to 7,172.15, 10,753.56 and 2,790.05

Step by Step Solution

1. Step 1: Write the proportion equation
   7,172.15 : 10,753.56 = 2,790.05 : x
2. Step 2: Convert to fraction form
   7,172.15/10,753.56 = 2,790.05/x
3. Step 3: Cross multiply
   7,172.15x = 10,753.56 × 2,790.05
4. Step 4: Simplify right side
   7,172.15x = 30,002,916.31
5. Step 5: Solve for x
   x = 30,002,916.31/7,172.15
6. Step 6: Final answer
   x = 4,183.26