Finding the Fourth Proportional to 8,790.72, 12,122.10 and 7,536.12

Step by Step Solution

1. Step 1: Write the proportion equation
   8,790.72 : 12,122.10 = 7,536.12 : x
2. Step 2: Convert to fraction form
   8,790.72/12,122.10 = 7,536.12/x
3. Step 3: Cross multiply
   8,790.72x = 12,122.10 × 7,536.12
4. Step 4: Simplify right side
   8,790.72x = 91,353,600.25
5. Step 5: Solve for x
   x = 91,353,600.25/8,790.72
6. Step 6: Final answer
   x = 10,392.05