Finding the Fourth Proportional to 12,123.98, 18,194.32 and 4,226.56

Step by Step Solution

1. Step 1: Write the proportion equation
   12,123.98 : 18,194.32 = 4,226.56 : x
2. Step 2: Convert to fraction form
   12,123.98/18,194.32 = 4,226.56/x
3. Step 3: Cross multiply
   12,123.98x = 18,194.32 × 4,226.56
4. Step 4: Simplify right side
   12,123.98x = 76,899,344.94
5. Step 5: Solve for x
   x = 76,899,344.94/12,123.98
6. Step 6: Final answer
   x = 6,342.75