Finding the Fourth Proportional to 11,085.32, 15,283.38 and 9,189.96

Step by Step Solution

1. Step 1: Write the proportion equation
   11,085.32 : 15,283.38 = 9,189.96 : x
2. Step 2: Convert to fraction form
   11,085.32/15,283.38 = 9,189.96/x
3. Step 3: Cross multiply
   11,085.32x = 15,283.38 × 9,189.96
4. Step 4: Simplify right side
   11,085.32x = 140,453,650.86
5. Step 5: Solve for x
   x = 140,453,650.86/11,085.32
6. Step 6: Final answer
   x = 12,670.24