Finding the Fourth Proportional to 13,692.12, 18,895.16 and 7,404.56

Step by Step Solution

1. Step 1: Write the proportion equation
   13,692.12 : 18,895.16 = 7,404.56 : x
2. Step 2: Convert to fraction form
   13,692.12/18,895.16 = 7,404.56/x
3. Step 3: Cross multiply
   13,692.12x = 18,895.16 × 7,404.56
4. Step 4: Simplify right side
   13,692.12x = 139,910,345.93
5. Step 5: Solve for x
   x = 139,910,345.93/13,692.12
6. Step 6: Final answer
   x = 10,218.31