Finding the Fourth Proportional to 8,143.44, 12,142.56 and 7,505.16

Step by Step Solution

1. Step 1: Write the proportion equation
   8,143.44 : 12,142.56 = 7,505.16 : x
2. Step 2: Convert to fraction form
   8,143.44/12,142.56 = 7,505.16/x
3. Step 3: Cross multiply
   8,143.44x = 12,142.56 × 7,505.16
4. Step 4: Simplify right side
   8,143.44x = 91,131,855.61
5. Step 5: Solve for x
   x = 91,131,855.61/8,143.44
6. Step 6: Final answer
   x = 11,190.83