Finding the Fourth Proportional to 13,692.24, 18,891.72 and 8,100.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,692.24 : 18,891.72 = 8,100.72 : x
2. Step 2: Convert to fraction form
   13,692.24/18,891.72 = 8,100.72/x
3. Step 3: Cross multiply
   13,692.24x = 18,891.72 × 8,100.72
4. Step 4: Simplify right side
   13,692.24x = 153,036,534.04
5. Step 5: Solve for x
   x = 153,036,534.04/13,692.24
6. Step 6: Final answer
   x = 11,176.88