Finding the Fourth Proportional to 11,369.72, 15,685.80 and 7,119.06

Step by Step Solution

1. Step 1: Write the proportion equation
   11,369.72 : 15,685.80 = 7,119.06 : x
2. Step 2: Convert to fraction form
   11,369.72/15,685.80 = 7,119.06/x
3. Step 3: Cross multiply
   11,369.72x = 15,685.80 × 7,119.06
4. Step 4: Simplify right side
   11,369.72x = 111,668,151.35
5. Step 5: Solve for x
   x = 111,668,151.35/11,369.72
6. Step 6: Final answer
   x = 9,821.54