Finding the Fourth Proportional to 12,664.32, 17,478.24 and 7,359.36

Step by Step Solution

1. Step 1: Write the proportion equation
   12,664.32 : 17,478.24 = 7,359.36 : x
2. Step 2: Convert to fraction form
   12,664.32/17,478.24 = 7,359.36/x
3. Step 3: Cross multiply
   12,664.32x = 17,478.24 × 7,359.36
4. Step 4: Simplify right side
   12,664.32x = 128,628,660.33
5. Step 5: Solve for x
   x = 128,628,660.33/12,664.32
6. Step 6: Final answer
   x = 10,156.78