Finding the Fourth Proportional to 13,062.76, 18,016.18 and 8,591.10

Step by Step Solution

1. Step 1: Write the proportion equation
   13,062.76 : 18,016.18 = 8,591.10 : x
2. Step 2: Convert to fraction form
   13,062.76/18,016.18 = 8,591.10/x
3. Step 3: Cross multiply
   13,062.76x = 18,016.18 × 8,591.10
4. Step 4: Simplify right side
   13,062.76x = 154,778,804.00
5. Step 5: Solve for x
   x = 154,778,804.00/13,062.76
6. Step 6: Final answer
   x = 11,848.86