Finding the Fourth Proportional to 13,536.39, 18,680.64 and 7,568.31

Step by Step Solution

1. Step 1: Write the proportion equation
   13,536.39 : 18,680.64 = 7,568.31 : x
2. Step 2: Convert to fraction form
   13,536.39/18,680.64 = 7,568.31/x
3. Step 3: Cross multiply
   13,536.39x = 18,680.64 × 7,568.31
4. Step 4: Simplify right side
   13,536.39x = 141,380,874.52
5. Step 5: Solve for x
   x = 141,380,874.52/13,536.39
6. Step 6: Final answer
   x = 10,444.50