Finding the Fourth Proportional to 11,087.37, 15,279.53 and 7,938.09

Step by Step Solution

1. Step 1: Write the proportion equation
   11,087.37 : 15,279.53 = 7,938.09 : x
2. Step 2: Convert to fraction form
   11,087.37/15,279.53 = 7,938.09/x
3. Step 3: Cross multiply
   11,087.37x = 15,279.53 × 7,938.09
4. Step 4: Simplify right side
   11,087.37x = 121,290,244.61
5. Step 5: Solve for x
   x = 121,290,244.61/11,087.37
6. Step 6: Final answer
   x = 10,939.50