Finding the Fourth Proportional to 8,671.94, 13,004.71 and 3,123.79

Step by Step Solution

1. Step 1: Write the proportion equation
   8,671.94 : 13,004.71 = 3,123.79 : x
2. Step 2: Convert to fraction form
   8,671.94/13,004.71 = 3,123.79/x
3. Step 3: Cross multiply
   8,671.94x = 13,004.71 × 3,123.79
4. Step 4: Simplify right side
   8,671.94x = 40,623,983.05
5. Step 5: Solve for x
   x = 40,623,983.05/8,671.94
6. Step 6: Final answer
   x = 4,684.53