Finding the Fourth Proportional to 13,086.72, 18,063.36 and 7,499.52

Step by Step Solution

1. Step 1: Write the proportion equation
   13,086.72 : 18,063.36 = 7,499.52 : x
2. Step 2: Convert to fraction form
   13,086.72/18,063.36 = 7,499.52/x
3. Step 3: Cross multiply
   13,086.72x = 18,063.36 × 7,499.52
4. Step 4: Simplify right side
   13,086.72x = 135,466,529.59
5. Step 5: Solve for x
   x = 135,466,529.59/13,086.72
6. Step 6: Final answer
   x = 10,351.45