Finding the Fourth Proportional to 12,993.78, 19,488.51 and 4,672.11

Step by Step Solution

1. Step 1: Write the proportion equation
   12,993.78 : 19,488.51 = 4,672.11 : x
2. Step 2: Convert to fraction form
   12,993.78/19,488.51 = 4,672.11/x
3. Step 3: Cross multiply
   12,993.78x = 19,488.51 × 4,672.11
4. Step 4: Simplify right side
   12,993.78x = 91,052,462.46
5. Step 5: Solve for x
   x = 91,052,462.46/12,993.78
6. Step 6: Final answer
   x = 7,007.39