Finding the Fourth Proportional to 9,212.54, 12,709.69 and 5,669.60

Step by Step Solution

1. Step 1: Write the proportion equation
   9,212.54 : 12,709.69 = 5,669.60 : x
2. Step 2: Convert to fraction form
   9,212.54/12,709.69 = 5,669.60/x
3. Step 3: Cross multiply
   9,212.54x = 12,709.69 × 5,669.60
4. Step 4: Simplify right side
   9,212.54x = 72,058,780.70
5. Step 5: Solve for x
   x = 72,058,780.70/9,212.54
6. Step 6: Final answer
   x = 7,821.82