Finding the Fourth Proportional to 12,821.96, 17,693.70 and 7,443.56

Step by Step Solution

1. Step 1: Write the proportion equation
   12,821.96 : 17,693.70 = 7,443.56 : x
2. Step 2: Convert to fraction form
   12,821.96/17,693.70 = 7,443.56/x
3. Step 3: Cross multiply
   12,821.96x = 17,693.70 × 7,443.56
4. Step 4: Simplify right side
   12,821.96x = 131,704,117.57
5. Step 5: Solve for x
   x = 131,704,117.57/12,821.96
6. Step 6: Final answer
   x = 10,271.76