Finding the Fourth Proportional to 11,119.56, 15,355.19 and 7,147.59

Step by Step Solution

1. Step 1: Write the proportion equation
   11,119.56 : 15,355.19 = 7,147.59 : x
2. Step 2: Convert to fraction form
   11,119.56/15,355.19 = 7,147.59/x
3. Step 3: Cross multiply
   11,119.56x = 15,355.19 × 7,147.59
4. Step 4: Simplify right side
   11,119.56x = 109,752,543.59
5. Step 5: Solve for x
   x = 109,752,543.59/11,119.56
6. Step 6: Final answer
   x = 9,870.23