Finding the Fourth Proportional to 12,847.41, 17,729.28 and 7,542.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,847.41 : 17,729.28 = 7,542.72 : x
2. Step 2: Convert to fraction form
   12,847.41/17,729.28 = 7,542.72/x
3. Step 3: Cross multiply
   12,847.41x = 17,729.28 × 7,542.72
4. Step 4: Simplify right side
   12,847.41x = 133,726,994.84
5. Step 5: Solve for x
   x = 133,726,994.84/12,847.41
6. Step 6: Final answer
   x = 10,408.87