Finding the Fourth Proportional to 17,218, 25,802.76 and 13,692.37

Step by Step Solution

1. Step 1: Write the proportion equation
   17,218 : 25,802.76 = 13,692.37 : x
2. Step 2: Convert to fraction form
   17,218/25,802.76 = 13,692.37/x
3. Step 3: Cross multiply
   17,218x = 25,802.76 × 13,692.37
4. Step 4: Simplify right side
   17,218x = 353,300,936.94
5. Step 5: Solve for x
   x = 353,300,936.94/17,218
6. Step 6: Final answer
   x = 20,519.28