Finding the Fourth Proportional to 9,789.36, 14,664.18 and 7,818.30

Step by Step Solution

1. Step 1: Write the proportion equation
   9,789.36 : 14,664.18 = 7,818.30 : x
2. Step 2: Convert to fraction form
   9,789.36/14,664.18 = 7,818.30/x
3. Step 3: Cross multiply
   9,789.36x = 14,664.18 × 7,818.30
4. Step 4: Simplify right side
   9,789.36x = 114,648,958.49
5. Step 5: Solve for x
   x = 114,648,958.49/9,789.36
6. Step 6: Final answer
   x = 11,711.59