Finding the Fourth Proportional to 12,913.53, 19,369.89 and 3,679.53

Step by Step Solution

1. Step 1: Write the proportion equation
   12,913.53 : 19,369.89 = 3,679.53 : x
2. Step 2: Convert to fraction form
   12,913.53/19,369.89 = 3,679.53/x
3. Step 3: Cross multiply
   12,913.53x = 19,369.89 × 3,679.53
4. Step 4: Simplify right side
   12,913.53x = 71,272,091.35
5. Step 5: Solve for x
   x = 71,272,091.35/12,913.53
6. Step 6: Final answer
   x = 5,519.18