Finding the Fourth Proportional to 11,872.13, 16,388.57 and 7,398.09

Step by Step Solution

1. Step 1: Write the proportion equation
   11,872.13 : 16,388.57 = 7,398.09 : x
2. Step 2: Convert to fraction form
   11,872.13/16,388.57 = 7,398.09/x
3. Step 3: Cross multiply
   11,872.13x = 16,388.57 × 7,398.09
4. Step 4: Simplify right side
   11,872.13x = 121,244,134.33
5. Step 5: Solve for x
   x = 121,244,134.33/11,872.13
6. Step 6: Final answer
   x = 10,212.50