Finding the Fourth Proportional to 13,055.49, 18,016.61 and 7,087.16

Step by Step Solution

1. Step 1: Write the proportion equation
   13,055.49 : 18,016.61 = 7,087.16 : x
2. Step 2: Convert to fraction form
   13,055.49/18,016.61 = 7,087.16/x
3. Step 3: Cross multiply
   13,055.49x = 18,016.61 × 7,087.16
4. Step 4: Simplify right side
   13,055.49x = 127,686,660.49
5. Step 5: Solve for x
   x = 127,686,660.49/13,055.49
6. Step 6: Final answer
   x = 9,780.31