Finding the Fourth Proportional to 9,328.96, 12,860.37 and 7,086.95

Step by Step Solution

1. Step 1: Write the proportion equation
   9,328.96 : 12,860.37 = 7,086.95 : x
2. Step 2: Convert to fraction form
   9,328.96/12,860.37 = 7,086.95/x
3. Step 3: Cross multiply
   9,328.96x = 12,860.37 × 7,086.95
4. Step 4: Simplify right side
   9,328.96x = 91,140,765.01
5. Step 5: Solve for x
   x = 91,140,765.01/9,328.96
6. Step 6: Final answer
   x = 9,769.66