Finding the Fourth Proportional to 12,993.61, 19,479.48 and 5,198.17

Step by Step Solution

1. Step 1: Write the proportion equation
   12,993.61 : 19,479.48 = 5,198.17 : x
2. Step 2: Convert to fraction form
   12,993.61/19,479.48 = 5,198.17/x
3. Step 3: Cross multiply
   12,993.61x = 19,479.48 × 5,198.17
4. Step 4: Simplify right side
   12,993.61x = 101,257,648.55
5. Step 5: Solve for x
   x = 101,257,648.55/12,993.61
6. Step 6: Final answer
   x = 7,792.88