Finding the Fourth Proportional to 8,729.50, 13,086.31 and 3,181.58

Step by Step Solution

1. Step 1: Write the proportion equation
   8,729.50 : 13,086.31 = 3,181.58 : x
2. Step 2: Convert to fraction form
   8,729.50/13,086.31 = 3,181.58/x
3. Step 3: Cross multiply
   8,729.50x = 13,086.31 × 3,181.58
4. Step 4: Simplify right side
   8,729.50x = 41,635,142.17
5. Step 5: Solve for x
   x = 41,635,142.17/8,729.50
6. Step 6: Final answer
   x = 4,769.48