Finding the Fourth Proportional to 11,886.42, 17,828.27 and 3,122.03

Step by Step Solution

1. Step 1: Write the proportion equation
   11,886.42 : 17,828.27 = 3,122.03 : x
2. Step 2: Convert to fraction form
   11,886.42/17,828.27 = 3,122.03/x
3. Step 3: Cross multiply
   11,886.42x = 17,828.27 × 3,122.03
4. Step 4: Simplify right side
   11,886.42x = 55,660,289.04
5. Step 5: Solve for x
   x = 55,660,289.04/11,886.42
6. Step 6: Final answer
   x = 4,682.68