Finding the Fourth Proportional to 13,521.76, 18,660.04 and 7,553.42

Step by Step Solution

1. Step 1: Write the proportion equation
   13,521.76 : 18,660.04 = 7,553.42 : x
2. Step 2: Convert to fraction form
   13,521.76/18,660.04 = 7,553.42/x
3. Step 3: Cross multiply
   13,521.76x = 18,660.04 × 7,553.42
4. Step 4: Simplify right side
   13,521.76x = 140,947,119.34
5. Step 5: Solve for x
   x = 140,947,119.34/13,521.76
6. Step 6: Final answer
   x = 10,423.73