Finding the Fourth Proportional to 13,499.86, 18,608.59 and 9,243.56

Step by Step Solution

1. Step 1: Write the proportion equation
   13,499.86 : 18,608.59 = 9,243.56 : x
2. Step 2: Convert to fraction form
   13,499.86/18,608.59 = 9,243.56/x
3. Step 3: Cross multiply
   13,499.86x = 18,608.59 × 9,243.56
4. Step 4: Simplify right side
   13,499.86x = 172,009,584.75
5. Step 5: Solve for x
   x = 172,009,584.75/13,499.86
6. Step 6: Final answer
   x = 12,741.58