Finding the Fourth Proportional to 12,821.16, 17,692.86 and 7,444.20

Step by Step Solution

1. Step 1: Write the proportion equation
   12,821.16 : 17,692.86 = 7,444.20 : x
2. Step 2: Convert to fraction form
   12,821.16/17,692.86 = 7,444.20/x
3. Step 3: Cross multiply
   12,821.16x = 17,692.86 × 7,444.20
4. Step 4: Simplify right side
   12,821.16x = 131,709,188.41
5. Step 5: Solve for x
   x = 131,709,188.41/12,821.16
6. Step 6: Final answer
   x = 10,272.80