Finding the Fourth Proportional to 8,525.57, 12,725.56 and 7,528.05

Step by Step Solution

1. Step 1: Write the proportion equation
   8,525.57 : 12,725.56 = 7,528.05 : x
2. Step 2: Convert to fraction form
   8,525.57/12,725.56 = 7,528.05/x
3. Step 3: Cross multiply
   8,525.57x = 12,725.56 × 7,528.05
4. Step 4: Simplify right side
   8,525.57x = 95,798,661.37
5. Step 5: Solve for x
   x = 95,798,661.37/8,525.57
6. Step 6: Final answer
   x = 11,236.63