Finding the Fourth Proportional to 12,123.51, 18,196.23 and 5,108.73

Step by Step Solution

1. Step 1: Write the proportion equation
   12,123.51 : 18,196.23 = 5,108.73 : x
2. Step 2: Convert to fraction form
   12,123.51/18,196.23 = 5,108.73/x
3. Step 3: Cross multiply
   12,123.51x = 18,196.23 × 5,108.73
4. Step 4: Simplify right side
   12,123.51x = 92,959,626.09
5. Step 5: Solve for x
   x = 92,959,626.09/12,123.51
6. Step 6: Final answer
   x = 7,667.72