Finding the Fourth Proportional to 12,913.38, 19,373.30 and 3,679.38

Step by Step Solution

1. Step 1: Write the proportion equation
   12,913.38 : 19,373.30 = 3,679.38 : x
2. Step 2: Convert to fraction form
   12,913.38/19,373.30 = 3,679.38/x
3. Step 3: Cross multiply
   12,913.38x = 19,373.30 × 3,679.38
4. Step 4: Simplify right side
   12,913.38x = 71,281,732.55
5. Step 5: Solve for x
   x = 71,281,732.55/12,913.38
6. Step 6: Final answer
   x = 5,519.99