Finding the Fourth Proportional to 13,111.06, 18,082.82 and 9,275.86

Step by Step Solution

1. Step 1: Write the proportion equation
   13,111.06 : 18,082.82 = 9,275.86 : x
2. Step 2: Convert to fraction form
   13,111.06/18,082.82 = 9,275.86/x
3. Step 3: Cross multiply
   13,111.06x = 18,082.82 × 9,275.86
4. Step 4: Simplify right side
   13,111.06x = 167,733,706.73
5. Step 5: Solve for x
   x = 167,733,706.73/13,111.06
6. Step 6: Final answer
   x = 12,793.30