Finding the Fourth Proportional to 12,993.12, 19,481.04 and 7,152.48

Step by Step Solution

1. Step 1: Write the proportion equation
   12,993.12 : 19,481.04 = 7,152.48 : x
2. Step 2: Convert to fraction form
   12,993.12/19,481.04 = 7,152.48/x
3. Step 3: Cross multiply
   12,993.12x = 19,481.04 × 7,152.48
4. Step 4: Simplify right side
   12,993.12x = 139,337,748.98
5. Step 5: Solve for x
   x = 139,337,748.98/12,993.12
6. Step 6: Final answer
   x = 10,723.96