Finding the Fourth Proportional to 11,019.55, 15,207.12 and 5,983.78

Step by Step Solution

1. Step 1: Write the proportion equation
   11,019.55 : 15,207.12 = 5,983.78 : x
2. Step 2: Convert to fraction form
   11,019.55/15,207.12 = 5,983.78/x
3. Step 3: Cross multiply
   11,019.55x = 15,207.12 × 5,983.78
4. Step 4: Simplify right side
   11,019.55x = 90,996,060.51
5. Step 5: Solve for x
   x = 90,996,060.51/11,019.55
6. Step 6: Final answer
   x = 8,257.69