Finding the Fourth Proportional to 8,399.42, 12,632.08 and 7,087.22

Step by Step Solution

1. Step 1: Write the proportion equation
   8,399.42 : 12,632.08 = 7,087.22 : x
2. Step 2: Convert to fraction form
   8,399.42/12,632.08 = 7,087.22/x
3. Step 3: Cross multiply
   8,399.42x = 12,632.08 × 7,087.22
4. Step 4: Simplify right side
   8,399.42x = 89,526,330.02
5. Step 5: Solve for x
   x = 89,526,330.02/8,399.42
6. Step 6: Final answer
   x = 10,658.63