Finding the Fourth Proportional to 9,056.42, 13,518.67 and 8,388.63

Step by Step Solution

1. Step 1: Write the proportion equation
   9,056.42 : 13,518.67 = 8,388.63 : x
2. Step 2: Convert to fraction form
   9,056.42/13,518.67 = 8,388.63/x
3. Step 3: Cross multiply
   9,056.42x = 13,518.67 × 8,388.63
4. Step 4: Simplify right side
   9,056.42x = 113,403,078.78
5. Step 5: Solve for x
   x = 113,403,078.78/9,056.42
6. Step 6: Final answer
   x = 12,521.84