Finding the Fourth Proportional to 17,217.98, 23,761.59 and 13,485.50

Step by Step Solution

1. Step 1: Write the proportion equation
   17,217.98 : 23,761.59 = 13,485.50 : x
2. Step 2: Convert to fraction form
   17,217.98/23,761.59 = 13,485.50/x
3. Step 3: Cross multiply
   17,217.98x = 23,761.59 × 13,485.50
4. Step 4: Simplify right side
   17,217.98x = 320,436,921.95
5. Step 5: Solve for x
   x = 320,436,921.95/17,217.98
6. Step 6: Final answer
   x = 18,610.60