Finding the Fourth Proportional to 9,009.61, 12,441.81 and 8,518.75

Step by Step Solution

1. Step 1: Write the proportion equation
   9,009.61 : 12,441.81 = 8,518.75 : x
2. Step 2: Convert to fraction form
   9,009.61/12,441.81 = 8,518.75/x
3. Step 3: Cross multiply
   9,009.61x = 12,441.81 × 8,518.75
4. Step 4: Simplify right side
   9,009.61x = 105,988,669.78
5. Step 5: Solve for x
   x = 105,988,669.78/9,009.61
6. Step 6: Final answer
   x = 11,763.96