Finding the Fourth Proportional to 9,947.20, 13,721.52 and 5,754.88

Step by Step Solution

1. Step 1: Write the proportion equation
   9,947.20 : 13,721.52 = 5,754.88 : x
2. Step 2: Convert to fraction form
   9,947.20/13,721.52 = 5,754.88/x
3. Step 3: Cross multiply
   9,947.20x = 13,721.52 × 5,754.88
4. Step 4: Simplify right side
   9,947.20x = 78,965,701.02
5. Step 5: Solve for x
   x = 78,965,701.02/9,947.20
6. Step 6: Final answer
   x = 7,938.49