Finding the Fourth Proportional to 13,178.24, 18,185.12 and 7,589.12

Step by Step Solution

1. Step 1: Write the proportion equation
   13,178.24 : 18,185.12 = 7,589.12 : x
2. Step 2: Convert to fraction form
   13,178.24/18,185.12 = 7,589.12/x
3. Step 3: Cross multiply
   13,178.24x = 18,185.12 × 7,589.12
4. Step 4: Simplify right side
   13,178.24x = 138,009,057.89
5. Step 5: Solve for x
   x = 138,009,057.89/13,178.24
6. Step 6: Final answer
   x = 10,472.50