Finding the Fourth Proportional to 12,196.12, 18,296.88 and 3,878.68

Step by Step Solution

1. Step 1: Write the proportion equation
   12,196.12 : 18,296.88 = 3,878.68 : x
2. Step 2: Convert to fraction form
   12,196.12/18,296.88 = 3,878.68/x
3. Step 3: Cross multiply
   12,196.12x = 18,296.88 × 3,878.68
4. Step 4: Simplify right side
   12,196.12x = 70,967,742.52
5. Step 5: Solve for x
   x = 70,967,742.52/12,196.12
6. Step 6: Final answer
   x = 5,818.88