Finding the Fourth Proportional to 13,086.48, 18,059.28 and 7,118.16

Step by Step Solution

1. Step 1: Write the proportion equation
   13,086.48 : 18,059.28 = 7,118.16 : x
2. Step 2: Convert to fraction form
   13,086.48/18,059.28 = 7,118.16/x
3. Step 3: Cross multiply
   13,086.48x = 18,059.28 × 7,118.16
4. Step 4: Simplify right side
   13,086.48x = 128,548,844.52
5. Step 5: Solve for x
   x = 128,548,844.52/13,086.48
6. Step 6: Final answer
   x = 9,823.03