Finding the Fourth Proportional to 13,055.57, 18,016.71 and 7,087.25

Step by Step Solution

1. Step 1: Write the proportion equation
   13,055.57 : 18,016.71 = 7,087.25 : x
2. Step 2: Convert to fraction form
   13,055.57/18,016.71 = 7,087.25/x
3. Step 3: Cross multiply
   13,055.57x = 18,016.71 × 7,087.25
4. Step 4: Simplify right side
   13,055.57x = 127,688,927.95
5. Step 5: Solve for x
   x = 127,688,927.95/13,055.57
6. Step 6: Final answer
   x = 9,780.42