Finding the Fourth Proportional to 13,536.72, 18,662.76 and 9,756.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,536.72 : 18,662.76 = 9,756.72 : x
2. Step 2: Convert to fraction form
   13,536.72/18,662.76 = 9,756.72/x
3. Step 3: Cross multiply
   13,536.72x = 18,662.76 × 9,756.72
4. Step 4: Simplify right side
   13,536.72x = 182,087,323.75
5. Step 5: Solve for x
   x = 182,087,323.75/13,536.72
6. Step 6: Final answer
   x = 13,451.36