Finding the Fourth Proportional to 12,965.06, 17,891.51 and 7,929.33

Step by Step Solution

1. Step 1: Write the proportion equation
   12,965.06 : 17,891.51 = 7,929.33 : x
2. Step 2: Convert to fraction form
   12,965.06/17,891.51 = 7,929.33/x
3. Step 3: Cross multiply
   12,965.06x = 17,891.51 × 7,929.33
4. Step 4: Simplify right side
   12,965.06x = 141,867,647.34
5. Step 5: Solve for x
   x = 141,867,647.34/12,965.06
6. Step 6: Final answer
   x = 10,942.31