Finding the Fourth Proportional to 11,281.98, 16,922.98 and 7,128.30

Step by Step Solution

1. Step 1: Write the proportion equation
   11,281.98 : 16,922.98 = 7,128.30 : x
2. Step 2: Convert to fraction form
   11,281.98/16,922.98 = 7,128.30/x
3. Step 3: Cross multiply
   11,281.98x = 16,922.98 × 7,128.30
4. Step 4: Simplify right side
   11,281.98x = 120,632,078.33
5. Step 5: Solve for x
   x = 120,632,078.33/11,281.98
6. Step 6: Final answer
   x = 10,692.46