Finding the Fourth Proportional to 12,913.50, 19,373.49 and 3,679.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,913.50 : 19,373.49 = 3,679.50 : x
2. Step 2: Convert to fraction form
   12,913.50/19,373.49 = 3,679.50/x
3. Step 3: Cross multiply
   12,913.50x = 19,373.49 × 3,679.50
4. Step 4: Simplify right side
   12,913.50x = 71,284,756.46
5. Step 5: Solve for x
   x = 71,284,756.46/12,913.50
6. Step 6: Final answer
   x = 5,520.17