Finding the Fourth Proportional to 10,987.56, 16,481.28 and 3,196.56

Step by Step Solution

1. Step 1: Write the proportion equation
   10,987.56 : 16,481.28 = 3,196.56 : x
2. Step 2: Convert to fraction form
   10,987.56/16,481.28 = 3,196.56/x
3. Step 3: Cross multiply
   10,987.56x = 16,481.28 × 3,196.56
4. Step 4: Simplify right side
   10,987.56x = 52,683,400.40
5. Step 5: Solve for x
   x = 52,683,400.40/10,987.56
6. Step 6: Final answer
   x = 4,794.82