Finding the Fourth Proportional to 12,097.71, 18,137.34 and 5,519.30

Step by Step Solution

1. Step 1: Write the proportion equation
   12,097.71 : 18,137.34 = 5,519.30 : x
2. Step 2: Convert to fraction form
   12,097.71/18,137.34 = 5,519.30/x
3. Step 3: Cross multiply
   12,097.71x = 18,137.34 × 5,519.30
4. Step 4: Simplify right side
   12,097.71x = 100,105,396.51
5. Step 5: Solve for x
   x = 100,105,396.51/12,097.71
6. Step 6: Final answer
   x = 8,274.74