Finding the Fourth Proportional to 8,653.50, 12,986.01 and 3,181.50

Step by Step Solution

1. Step 1: Write the proportion equation
   8,653.50 : 12,986.01 = 3,181.50 : x
2. Step 2: Convert to fraction form
   8,653.50/12,986.01 = 3,181.50/x
3. Step 3: Cross multiply
   8,653.50x = 12,986.01 × 3,181.50
4. Step 4: Simplify right side
   8,653.50x = 41,314,990.82
5. Step 5: Solve for x
   x = 41,314,990.82/8,653.50
6. Step 6: Final answer
   x = 4,774.37