Finding the Fourth Proportional to 11,388.28, 17,056.18 and 10,994.28

Step by Step Solution

1. Step 1: Write the proportion equation
   11,388.28 : 17,056.18 = 10,994.28 : x
2. Step 2: Convert to fraction form
   11,388.28/17,056.18 = 10,994.28/x
3. Step 3: Cross multiply
   11,388.28x = 17,056.18 × 10,994.28
4. Step 4: Simplify right side
   11,388.28x = 187,520,418.65
5. Step 5: Solve for x
   x = 187,520,418.65/11,388.28
6. Step 6: Final answer
   x = 16,466.09