Finding the Fourth Proportional to 8,528.42, 12,789.83 and 3,118.02

Step by Step Solution

1. Step 1: Write the proportion equation
   8,528.42 : 12,789.83 = 3,118.02 : x
2. Step 2: Convert to fraction form
   8,528.42/12,789.83 = 3,118.02/x
3. Step 3: Cross multiply
   8,528.42x = 12,789.83 × 3,118.02
4. Step 4: Simplify right side
   8,528.42x = 39,878,930.15
5. Step 5: Solve for x
   x = 39,878,930.15/8,528.42
6. Step 6: Final answer
   x = 4,676.01