Finding the Fourth Proportional to 13,789.68, 19,028.04 and 8,123.10

Step by Step Solution

1. Step 1: Write the proportion equation
   13,789.68 : 19,028.04 = 8,123.10 : x
2. Step 2: Convert to fraction form
   13,789.68/19,028.04 = 8,123.10/x
3. Step 3: Cross multiply
   13,789.68x = 19,028.04 × 8,123.10
4. Step 4: Simplify right side
   13,789.68x = 154,566,671.72
5. Step 5: Solve for x
   x = 154,566,671.72/13,789.68
6. Step 6: Final answer
   x = 11,208.87