Finding the Fourth Proportional to 13,969.32, 19,271.16 and 8,662.20

Step by Step Solution

1. Step 1: Write the proportion equation
   13,969.32 : 19,271.16 = 8,662.20 : x
2. Step 2: Convert to fraction form
   13,969.32/19,271.16 = 8,662.20/x
3. Step 3: Cross multiply
   13,969.32x = 19,271.16 × 8,662.20
4. Step 4: Simplify right side
   13,969.32x = 166,930,642.15
5. Step 5: Solve for x
   x = 166,930,642.15/13,969.32
6. Step 6: Final answer
   x = 11,949.80