Finding the Fourth Proportional to 13,521.86, 18,661 and 7,553.96

Step by Step Solution

1. Step 1: Write the proportion equation
   13,521.86 : 18,661 = 7,553.96 : x
2. Step 2: Convert to fraction form
   13,521.86/18,661 = 7,553.96/x
3. Step 3: Cross multiply
   13,521.86x = 18,661 × 7,553.96
4. Step 4: Simplify right side
   13,521.86x = 140,964,447.56
5. Step 5: Solve for x
   x = 140,964,447.56/13,521.86
6. Step 6: Final answer
   x = 10,424.93