Finding the Fourth Proportional to 8,789.35, 13,174.78 and 3,239.14

Step by Step Solution

1. Step 1: Write the proportion equation
   8,789.35 : 13,174.78 = 3,239.14 : x
2. Step 2: Convert to fraction form
   8,789.35/13,174.78 = 3,239.14/x
3. Step 3: Cross multiply
   8,789.35x = 13,174.78 × 3,239.14
4. Step 4: Simplify right side
   8,789.35x = 42,674,956.89
5. Step 5: Solve for x
   x = 42,674,956.89/8,789.35
6. Step 6: Final answer
   x = 4,855.30