Finding the Fourth Proportional to 11,181.77, 15,426.42 and 7,205.20

Step by Step Solution

1. Step 1: Write the proportion equation
   11,181.77 : 15,426.42 = 7,205.20 : x
2. Step 2: Convert to fraction form
   11,181.77/15,426.42 = 7,205.20/x
3. Step 3: Cross multiply
   11,181.77x = 15,426.42 × 7,205.20
4. Step 4: Simplify right side
   11,181.77x = 111,150,523.37
5. Step 5: Solve for x
   x = 111,150,523.37/11,181.77
6. Step 6: Final answer
   x = 9,940.33