Finding the Fourth Proportional to 11,005, 15,180.18 and 7,228.60

Step by Step Solution

1. Step 1: Write the proportion equation
   11,005 : 15,180.18 = 7,228.60 : x
2. Step 2: Convert to fraction form
   11,005/15,180.18 = 7,228.60/x
3. Step 3: Cross multiply
   11,005x = 15,180.18 × 7,228.60
4. Step 4: Simplify right side
   11,005x = 109,731,449.15
5. Step 5: Solve for x
   x = 109,731,449.15/11,005
6. Step 6: Final answer
   x = 9,971.05