Finding the Fourth Proportional to 12,906.88, 17,806.08 and 7,936

Step by Step Solution

1. Step 1: Write the proportion equation
   12,906.88 : 17,806.08 = 7,936 : x
2. Step 2: Convert to fraction form
   12,906.88/17,806.08 = 7,936/x
3. Step 3: Cross multiply
   12,906.88x = 17,806.08 × 7,936
4. Step 4: Simplify right side
   12,906.88x = 141,309,050.88
5. Step 5: Solve for x
   x = 141,309,050.88/12,906.88
6. Step 6: Final answer
   x = 10,948.35