Finding the Fourth Proportional to 11,886.54, 16,398.27 and 7,168.20

Step by Step Solution

1. Step 1: Write the proportion equation
   11,886.54 : 16,398.27 = 7,168.20 : x
2. Step 2: Convert to fraction form
   11,886.54/16,398.27 = 7,168.20/x
3. Step 3: Cross multiply
   11,886.54x = 16,398.27 × 7,168.20
4. Step 4: Simplify right side
   11,886.54x = 117,546,079.01
5. Step 5: Solve for x
   x = 117,546,079.01/11,886.54
6. Step 6: Final answer
   x = 9,889.01