Finding the Fourth Proportional to 12,995.16, 17,930.70 and 7,690.68

Step by Step Solution

1. Step 1: Write the proportion equation
   12,995.16 : 17,930.70 = 7,690.68 : x
2. Step 2: Convert to fraction form
   12,995.16/17,930.70 = 7,690.68/x
3. Step 3: Cross multiply
   12,995.16x = 17,930.70 × 7,690.68
4. Step 4: Simplify right side
   12,995.16x = 137,899,275.88
5. Step 5: Solve for x
   x = 137,899,275.88/12,995.16
6. Step 6: Final answer
   x = 10,611.59