Finding the Fourth Proportional to 13,488.34, 18,616.89 and 8,764.42

Step by Step Solution

1. Step 1: Write the proportion equation
   13,488.34 : 18,616.89 = 8,764.42 : x
2. Step 2: Convert to fraction form
   13,488.34/18,616.89 = 8,764.42/x
3. Step 3: Cross multiply
   13,488.34x = 18,616.89 × 8,764.42
4. Step 4: Simplify right side
   13,488.34x = 163,166,243.05
5. Step 5: Solve for x
   x = 163,166,243.05/13,488.34
6. Step 6: Final answer
   x = 12,096.84