Finding the Fourth Proportional to 9,796.84, 14,680.86 and 7,721.92

Step by Step Solution

1. Step 1: Write the proportion equation
   9,796.84 : 14,680.86 = 7,721.92 : x
2. Step 2: Convert to fraction form
   9,796.84/14,680.86 = 7,721.92/x
3. Step 3: Cross multiply
   9,796.84x = 14,680.86 × 7,721.92
4. Step 4: Simplify right side
   9,796.84x = 113,364,426.45
5. Step 5: Solve for x
   x = 113,364,426.45/9,796.84
6. Step 6: Final answer
   x = 11,571.53