Finding the Fourth Proportional to 12,993, 17,932.10 and 7,328.91

Step by Step Solution

1. Step 1: Write the proportion equation
   12,993 : 17,932.10 = 7,328.91 : x
2. Step 2: Convert to fraction form
   12,993/17,932.10 = 7,328.91/x
3. Step 3: Cross multiply
   12,993x = 17,932.10 × 7,328.91
4. Step 4: Simplify right side
   12,993x = 131,422,747.01
5. Step 5: Solve for x
   x = 131,422,747.01/12,993
6. Step 6: Final answer
   x = 10,114.89