Finding the Fourth Proportional to 8,242.24, 12,352.56 and 7,142.08

Step by Step Solution

1. Step 1: Write the proportion equation
   8,242.24 : 12,352.56 = 7,142.08 : x
2. Step 2: Convert to fraction form
   8,242.24/12,352.56 = 7,142.08/x
3. Step 3: Cross multiply
   8,242.24x = 12,352.56 × 7,142.08
4. Step 4: Simplify right side
   8,242.24x = 88,222,971.72
5. Step 5: Solve for x
   x = 88,222,971.72/8,242.24
6. Step 6: Final answer
   x = 10,703.76