Finding the Fourth Proportional to 11,013.81, 15,199.16 and 5,978.07

Step by Step Solution

1. Step 1: Write the proportion equation
   11,013.81 : 15,199.16 = 5,978.07 : x
2. Step 2: Convert to fraction form
   11,013.81/15,199.16 = 5,978.07/x
3. Step 3: Cross multiply
   11,013.81x = 15,199.16 × 5,978.07
4. Step 4: Simplify right side
   11,013.81x = 90,861,642.42
5. Step 5: Solve for x
   x = 90,861,642.42/11,013.81
6. Step 6: Final answer
   x = 8,249.79