Finding the Fourth Proportional to 17,290.17, 23,863.55 and 13,557.69

Step by Step Solution

1. Step 1: Write the proportion equation
   17,290.17 : 23,863.55 = 13,557.69 : x
2. Step 2: Convert to fraction form
   17,290.17/23,863.55 = 13,557.69/x
3. Step 3: Cross multiply
   17,290.17x = 23,863.55 × 13,557.69
4. Step 4: Simplify right side
   17,290.17x = 323,534,545.41
5. Step 5: Solve for x
   x = 323,534,545.41/17,290.17
6. Step 6: Final answer
   x = 18,712.05