Finding the Fourth Proportional to 9,256.76, 12,773.86 and 5,720.28

Step by Step Solution

1. Step 1: Write the proportion equation
   9,256.76 : 12,773.86 = 5,720.28 : x
2. Step 2: Convert to fraction form
   9,256.76/12,773.86 = 5,720.28/x
3. Step 3: Cross multiply
   9,256.76x = 12,773.86 × 5,720.28
4. Step 4: Simplify right side
   9,256.76x = 73,070,055.88
5. Step 5: Solve for x
   x = 73,070,055.88/9,256.76
6. Step 6: Final answer
   x = 7,893.70