Finding the Fourth Proportional to 21,692.72, 29,936.76 and 12,260.72

Step by Step Solution

1. Step 1: Write the proportion equation
   21,692.72 : 29,936.76 = 12,260.72 : x
2. Step 2: Convert to fraction form
   21,692.72/29,936.76 = 12,260.72/x
3. Step 3: Cross multiply
   21,692.72x = 29,936.76 × 12,260.72
4. Step 4: Simplify right side
   21,692.72x = 367,046,232.07
5. Step 5: Solve for x
   x = 367,046,232.07/21,692.72
6. Step 6: Final answer
   x = 16,920.25