Finding the Fourth Proportional to 9,388.18, 12,886.67 and 8,302.15

Step by Step Solution

1. Step 1: Write the proportion equation
   9,388.18 : 12,886.67 = 8,302.15 : x
2. Step 2: Convert to fraction form
   9,388.18/12,886.67 = 8,302.15/x
3. Step 3: Cross multiply
   9,388.18x = 12,886.67 × 8,302.15
4. Step 4: Simplify right side
   9,388.18x = 106,987,067.34
5. Step 5: Solve for x
   x = 106,987,067.34/9,388.18
6. Step 6: Final answer
   x = 11,395.93