Finding the Fourth Proportional to 12,638.34, 17,437.41 and 8,162.28

Step by Step Solution

1. Step 1: Write the proportion equation
   12,638.34 : 17,437.41 = 8,162.28 : x
2. Step 2: Convert to fraction form
   12,638.34/17,437.41 = 8,162.28/x
3. Step 3: Cross multiply
   12,638.34x = 17,437.41 × 8,162.28
4. Step 4: Simplify right side
   12,638.34x = 142,329,022.89
5. Step 5: Solve for x
   x = 142,329,022.89/12,638.34
6. Step 6: Final answer
   x = 11,261.69