Finding the Fourth Proportional to 8,743.82, 13,110.69 and 5,187.31

Step by Step Solution

1. Step 1: Write the proportion equation
   8,743.82 : 13,110.69 = 5,187.31 : x
2. Step 2: Convert to fraction form
   8,743.82/13,110.69 = 5,187.31/x
3. Step 3: Cross multiply
   8,743.82x = 13,110.69 × 5,187.31
4. Step 4: Simplify right side
   8,743.82x = 68,009,200.02
5. Step 5: Solve for x
   x = 68,009,200.02/8,743.82
6. Step 6: Final answer
   x = 7,777.98