Finding the Fourth Proportional to 8,071.72, 11,142.12 and 5,086.97

Step by Step Solution

1. Step 1: Write the proportion equation
   8,071.72 : 11,142.12 = 5,086.97 : x
2. Step 2: Convert to fraction form
   8,071.72/11,142.12 = 5,086.97/x
3. Step 3: Cross multiply
   8,071.72x = 11,142.12 × 5,086.97
4. Step 4: Simplify right side
   8,071.72x = 56,679,630.18
5. Step 5: Solve for x
   x = 56,679,630.18/8,071.72
6. Step 6: Final answer
   x = 7,022.00