Finding the Fourth Proportional to 13,055.64, 18,016.71 and 7,087.29

Step by Step Solution

1. Step 1: Write the proportion equation
   13,055.64 : 18,016.71 = 7,087.29 : x
2. Step 2: Convert to fraction form
   13,055.64/18,016.71 = 7,087.29/x
3. Step 3: Cross multiply
   13,055.64x = 18,016.71 × 7,087.29
4. Step 4: Simplify right side
   13,055.64x = 127,689,648.62
5. Step 5: Solve for x
   x = 127,689,648.62/13,055.64
6. Step 6: Final answer
   x = 9,780.42