Finding the Fourth Proportional to 13,086.33, 18,058.95 and 7,118.04

Step by Step Solution

1. Step 1: Write the proportion equation
   13,086.33 : 18,058.95 = 7,118.04 : x
2. Step 2: Convert to fraction form
   13,086.33/18,058.95 = 7,118.04/x
3. Step 3: Cross multiply
   13,086.33x = 18,058.95 × 7,118.04
4. Step 4: Simplify right side
   13,086.33x = 128,544,328.46
5. Step 5: Solve for x
   x = 128,544,328.46/13,086.33
6. Step 6: Final answer
   x = 9,822.79