Finding the Fourth Proportional to 13,086.12, 18,058.93 and 7,117.83

Step by Step Solution

1. Step 1: Write the proportion equation
   13,086.12 : 18,058.93 = 7,117.83 : x
2. Step 2: Convert to fraction form
   13,086.12/18,058.93 = 7,117.83/x
3. Step 3: Cross multiply
   13,086.12x = 18,058.93 × 7,117.83
4. Step 4: Simplify right side
   13,086.12x = 128,540,393.72
5. Step 5: Solve for x
   x = 128,540,393.72/13,086.12
6. Step 6: Final answer
   x = 9,822.65