Finding the Fourth Proportional to 12,615.75, 17,405.82 and 7,581.12

Step by Step Solution

1. Step 1: Write the proportion equation
   12,615.75 : 17,405.82 = 7,581.12 : x
2. Step 2: Convert to fraction form
   12,615.75/17,405.82 = 7,581.12/x
3. Step 3: Cross multiply
   12,615.75x = 17,405.82 × 7,581.12
4. Step 4: Simplify right side
   12,615.75x = 131,955,610.12
5. Step 5: Solve for x
   x = 131,955,610.12/12,615.75
6. Step 6: Final answer
   x = 10,459.59