Finding the Fourth Proportional to 9,256.50, 12,779.82 and 5,721.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,256.50 : 12,779.82 = 5,721.72 : x
2. Step 2: Convert to fraction form
   9,256.50/12,779.82 = 5,721.72/x
3. Step 3: Cross multiply
   9,256.50x = 12,779.82 × 5,721.72
4. Step 4: Simplify right side
   9,256.50x = 73,122,551.69
5. Step 5: Solve for x
   x = 73,122,551.69/9,256.50
6. Step 6: Final answer
   x = 7,899.59