Finding the Fourth Proportional to 12,661.10, 17,472.60 and 7,356.27

Step by Step Solution

1. Step 1: Write the proportion equation
   12,661.10 : 17,472.60 = 7,356.27 : x
2. Step 2: Convert to fraction form
   12,661.10/17,472.60 = 7,356.27/x
3. Step 3: Cross multiply
   12,661.10x = 17,472.60 × 7,356.27
4. Step 4: Simplify right side
   12,661.10x = 128,533,163.20
5. Step 5: Solve for x
   x = 128,533,163.20/12,661.10
6. Step 6: Final answer
   x = 10,151.82