Finding the Fourth Proportional to 12,993.16, 17,927.94 and 7,688.68

Step by Step Solution

1. Step 1: Write the proportion equation
   12,993.16 : 17,927.94 = 7,688.68 : x
2. Step 2: Convert to fraction form
   12,993.16/17,927.94 = 7,688.68/x
3. Step 3: Cross multiply
   12,993.16x = 17,927.94 × 7,688.68
4. Step 4: Simplify right side
   12,993.16x = 137,842,193.72
5. Step 5: Solve for x
   x = 137,842,193.72/12,993.16
6. Step 6: Final answer
   x = 10,608.83