Finding the Fourth Proportional to 13,311.52, 18,368.82 and 7,644.46

Step by Step Solution

1. Step 1: Write the proportion equation
   13,311.52 : 18,368.82 = 7,644.46 : x
2. Step 2: Convert to fraction form
   13,311.52/18,368.82 = 7,644.46/x
3. Step 3: Cross multiply
   13,311.52x = 18,368.82 × 7,644.46
4. Step 4: Simplify right side
   13,311.52x = 140,419,709.74
5. Step 5: Solve for x
   x = 140,419,709.74/13,311.52
6. Step 6: Final answer
   x = 10,548.74