Finding the Fourth Proportional to 13,086.72, 18,060.48 and 7,499.52

Step by Step Solution

1. Step 1: Write the proportion equation
   13,086.72 : 18,060.48 = 7,499.52 : x
2. Step 2: Convert to fraction form
   13,086.72/18,060.48 = 7,499.52/x
3. Step 3: Cross multiply
   13,086.72x = 18,060.48 × 7,499.52
4. Step 4: Simplify right side
   13,086.72x = 135,444,930.97
5. Step 5: Solve for x
   x = 135,444,930.97/13,086.72
6. Step 6: Final answer
   x = 10,349.80