Finding the Fourth Proportional to 13,615.46, 18,789.22 and 7,647

Step by Step Solution

1. Step 1: Write the proportion equation
   13,615.46 : 18,789.22 = 7,647 : x
2. Step 2: Convert to fraction form
   13,615.46/18,789.22 = 7,647/x
3. Step 3: Cross multiply
   13,615.46x = 18,789.22 × 7,647
4. Step 4: Simplify right side
   13,615.46x = 143,681,165.34
5. Step 5: Solve for x
   x = 143,681,165.34/13,615.46
6. Step 6: Final answer
   x = 10,552.80