Finding the Fourth Proportional to 12,123.74, 16,730.59 and 6,818.55

Step by Step Solution

1. Step 1: Write the proportion equation
   12,123.74 : 16,730.59 = 6,818.55 : x
2. Step 2: Convert to fraction form
   12,123.74/16,730.59 = 6,818.55/x
3. Step 3: Cross multiply
   12,123.74x = 16,730.59 × 6,818.55
4. Step 4: Simplify right side
   12,123.74x = 114,078,364.44
5. Step 5: Solve for x
   x = 114,078,364.44/12,123.74
6. Step 6: Final answer
   x = 9,409.50