Finding the Fourth Proportional to 9,928.12, 13,715.04 and 7,936.06

Step by Step Solution

1. Step 1: Write the proportion equation
   9,928.12 : 13,715.04 = 7,936.06 : x
2. Step 2: Convert to fraction form
   9,928.12/13,715.04 = 7,936.06/x
3. Step 3: Cross multiply
   9,928.12x = 13,715.04 × 7,936.06
4. Step 4: Simplify right side
   9,928.12x = 108,843,380.34
5. Step 5: Solve for x
   x = 108,843,380.34/9,928.12
6. Step 6: Final answer
   x = 10,963.14