Finding the Fourth Proportional to 13,086.06, 18,058.49 and 7,117.88

Step by Step Solution

1. Step 1: Write the proportion equation
   13,086.06 : 18,058.49 = 7,117.88 : x
2. Step 2: Convert to fraction form
   13,086.06/18,058.49 = 7,117.88/x
3. Step 3: Cross multiply
   13,086.06x = 18,058.49 × 7,117.88
4. Step 4: Simplify right side
   13,086.06x = 128,538,105.65
5. Step 5: Solve for x
   x = 128,538,105.65/13,086.06
6. Step 6: Final answer
   x = 9,822.52