Finding the Fourth Proportional to 13,085.62, 18,058.24 and 7,117.33

Step by Step Solution

1. Step 1: Write the proportion equation
   13,085.62 : 18,058.24 = 7,117.33 : x
2. Step 2: Convert to fraction form
   13,085.62/18,058.24 = 7,117.33/x
3. Step 3: Cross multiply
   13,085.62x = 18,058.24 × 7,117.33
4. Step 4: Simplify right side
   13,085.62x = 128,526,453.30
5. Step 5: Solve for x
   x = 128,526,453.30/13,085.62
6. Step 6: Final answer
   x = 9,821.96