Finding the Fourth Proportional to 8,128.41, 12,190.10 and 2,933.61

Step by Step Solution

1. Step 1: Write the proportion equation
   8,128.41 : 12,190.10 = 2,933.61 : x
2. Step 2: Convert to fraction form
   8,128.41/12,190.10 = 2,933.61/x
3. Step 3: Cross multiply
   8,128.41x = 12,190.10 × 2,933.61
4. Step 4: Simplify right side
   8,128.41x = 35,760,984.59
5. Step 5: Solve for x
   x = 35,760,984.59/8,128.41
6. Step 6: Final answer
   x = 4,399.51