Finding the Fourth Proportional to 8,712.77, 12,020.00 and 5,724.68

Step by Step Solution

1. Step 1: Write the proportion equation
   8,712.77 : 12,020.00 = 5,724.68 : x
2. Step 2: Convert to fraction form
   8,712.77/12,020.00 = 5,724.68/x
3. Step 3: Cross multiply
   8,712.77x = 12,020.00 × 5,724.68
4. Step 4: Simplify right side
   8,712.77x = 68,810,564.88
5. Step 5: Solve for x
   x = 68,810,564.88/8,712.77
6. Step 6: Final answer
   x = 7,897.67