Finding the Fourth Proportional to 8,536.56, 12,803.76 and 7,085.04

Step by Step Solution

1. Step 1: Write the proportion equation
   8,536.56 : 12,803.76 = 7,085.04 : x
2. Step 2: Convert to fraction form
   8,536.56/12,803.76 = 7,085.04/x
3. Step 3: Cross multiply
   8,536.56x = 12,803.76 × 7,085.04
4. Step 4: Simplify right side
   8,536.56x = 90,715,151.75
5. Step 5: Solve for x
   x = 90,715,151.75/8,536.56
6. Step 6: Final answer
   x = 10,626.66