Finding the Fourth Proportional to 8,911.89, 12,301.07 and 5,768.28

Step by Step Solution

1. Step 1: Write the proportion equation
   8,911.89 : 12,301.07 = 5,768.28 : x
2. Step 2: Convert to fraction form
   8,911.89/12,301.07 = 5,768.28/x
3. Step 3: Cross multiply
   8,911.89x = 12,301.07 × 5,768.28
4. Step 4: Simplify right side
   8,911.89x = 70,955,987.22
5. Step 5: Solve for x
   x = 70,955,987.22/8,911.89
6. Step 6: Final answer
   x = 7,961.95