Finding the Fourth Proportional to 9,836.72, 13,560.36 and 7,947.92

Step by Step Solution

1. Step 1: Write the proportion equation
   9,836.72 : 13,560.36 = 7,947.92 : x
2. Step 2: Convert to fraction form
   9,836.72/13,560.36 = 7,947.92/x
3. Step 3: Cross multiply
   9,836.72x = 13,560.36 × 7,947.92
4. Step 4: Simplify right side
   9,836.72x = 107,776,656.45
5. Step 5: Solve for x
   x = 107,776,656.45/9,836.72
6. Step 6: Final answer
   x = 10,956.56