Finding the Fourth Proportional to 13,488.89, 18,608.05 and 9,013.74

Step by Step Solution

1. Step 1: Write the proportion equation
   13,488.89 : 18,608.05 = 9,013.74 : x
2. Step 2: Convert to fraction form
   13,488.89/18,608.05 = 9,013.74/x
3. Step 3: Cross multiply
   13,488.89x = 18,608.05 × 9,013.74
4. Step 4: Simplify right side
   13,488.89x = 167,728,015.39
5. Step 5: Solve for x
   x = 167,728,015.39/13,488.89
6. Step 6: Final answer
   x = 12,434.54