Finding the Fourth Proportional to 8,725.20, 13,018.53 and 8,105.82

Step by Step Solution

1. Step 1: Write the proportion equation
   8,725.20 : 13,018.53 = 8,105.82 : x
2. Step 2: Convert to fraction form
   8,725.20/13,018.53 = 8,105.82/x
3. Step 3: Cross multiply
   8,725.20x = 13,018.53 × 8,105.82
4. Step 4: Simplify right side
   8,725.20x = 105,525,860.84
5. Step 5: Solve for x
   x = 105,525,860.84/8,725.20
6. Step 6: Final answer
   x = 12,094.38