Finding the Fourth Proportional to 8,769.82, 12,102.06 and 5,231.20

Step by Step Solution

1. Step 1: Write the proportion equation
   8,769.82 : 12,102.06 = 5,231.20 : x
2. Step 2: Convert to fraction form
   8,769.82/12,102.06 = 5,231.20/x
3. Step 3: Cross multiply
   8,769.82x = 12,102.06 × 5,231.20
4. Step 4: Simplify right side
   8,769.82x = 63,308,296.27
5. Step 5: Solve for x
   x = 63,308,296.27/8,769.82
6. Step 6: Final answer
   x = 7,218.88