Finding the Fourth Proportional to 12,179.40, 18,268.35 and 7,500.30

Step by Step Solution

1. Step 1: Write the proportion equation
   12,179.40 : 18,268.35 = 7,500.30 : x
2. Step 2: Convert to fraction form
   12,179.40/18,268.35 = 7,500.30/x
3. Step 3: Cross multiply
   12,179.40x = 18,268.35 × 7,500.30
4. Step 4: Simplify right side
   12,179.40x = 137,018,105.51
5. Step 5: Solve for x
   x = 137,018,105.51/12,179.40
6. Step 6: Final answer
   x = 11,249.99