Finding the Fourth Proportional to 17,139.08, 23,682.72 and 13,371.68

Step by Step Solution

1. Step 1: Write the proportion equation
   17,139.08 : 23,682.72 = 13,371.68 : x
2. Step 2: Convert to fraction form
   17,139.08/23,682.72 = 13,371.68/x
3. Step 3: Cross multiply
   17,139.08x = 23,682.72 × 13,371.68
4. Step 4: Simplify right side
   17,139.08x = 316,677,753.37
5. Step 5: Solve for x
   x = 316,677,753.37/17,139.08
6. Step 6: Final answer
   x = 18,476.94