Finding the Fourth Proportional to 9,257.79, 12,776.00 and 5,720.67

Step by Step Solution

1. Step 1: Write the proportion equation
   9,257.79 : 12,776.00 = 5,720.67 : x
2. Step 2: Convert to fraction form
   9,257.79/12,776.00 = 5,720.67/x
3. Step 3: Cross multiply
   9,257.79x = 12,776.00 × 5,720.67
4. Step 4: Simplify right side
   9,257.79x = 73,087,251.32
5. Step 5: Solve for x
   x = 73,087,251.32/9,257.79
6. Step 6: Final answer
   x = 7,894.68