Finding the Fourth Proportional to 9,510.81, 14,259.83 and 8,521.19

Step by Step Solution

1. Step 1: Write the proportion equation
   9,510.81 : 14,259.83 = 8,521.19 : x
2. Step 2: Convert to fraction form
   9,510.81/14,259.83 = 8,521.19/x
3. Step 3: Cross multiply
   9,510.81x = 14,259.83 × 8,521.19
4. Step 4: Simplify right side
   9,510.81x = 121,510,720.80
5. Step 5: Solve for x
   x = 121,510,720.80/9,510.81
6. Step 6: Final answer
   x = 12,776.06