Finding the Fourth Proportional to 12,661.68, 17,471.94 and 7,356.42

Step by Step Solution

1. Step 1: Write the proportion equation
   12,661.68 : 17,471.94 = 7,356.42 : x
2. Step 2: Convert to fraction form
   12,661.68/17,471.94 = 7,356.42/x
3. Step 3: Cross multiply
   12,661.68x = 17,471.94 × 7,356.42
4. Step 4: Simplify right side
   12,661.68x = 128,530,928.85
5. Step 5: Solve for x
   x = 128,530,928.85/12,661.68
6. Step 6: Final answer
   x = 10,151.17