Finding the Fourth Proportional to 13,086.26, 18,059.18 and 7,117.93

Step by Step Solution

1. Step 1: Write the proportion equation
   13,086.26 : 18,059.18 = 7,117.93 : x
2. Step 2: Convert to fraction form
   13,086.26/18,059.18 = 7,117.93/x
3. Step 3: Cross multiply
   13,086.26x = 18,059.18 × 7,117.93
4. Step 4: Simplify right side
   13,086.26x = 128,543,979.10
5. Step 5: Solve for x
   x = 128,543,979.10/13,086.26
6. Step 6: Final answer
   x = 9,822.82