Finding the Fourth Proportional to 13,054.91, 18,016.16 and 7,086.96

Step by Step Solution

1. Step 1: Write the proportion equation
   13,054.91 : 18,016.16 = 7,086.96 : x
2. Step 2: Convert to fraction form
   13,054.91/18,016.16 = 7,086.96/x
3. Step 3: Cross multiply
   13,054.91x = 18,016.16 × 7,086.96
4. Step 4: Simplify right side
   13,054.91x = 127,679,769.84
5. Step 5: Solve for x
   x = 127,679,769.84/13,054.91
6. Step 6: Final answer
   x = 9,780.21