Finding the Fourth Proportional to 12,662.54, 17,478 and 7,359.47

Step by Step Solution

1. Step 1: Write the proportion equation
   12,662.54 : 17,478 = 7,359.47 : x
2. Step 2: Convert to fraction form
   12,662.54/17,478 = 7,359.47/x
3. Step 3: Cross multiply
   12,662.54x = 17,478 × 7,359.47
4. Step 4: Simplify right side
   12,662.54x = 128,628,729.27
5. Step 5: Solve for x
   x = 128,628,729.27/12,662.54
6. Step 6: Final answer
   x = 10,158.21