Finding the Fourth Proportional to 21,811, 32,715.78 and 7,020.76

Step by Step Solution

1. Step 1: Write the proportion equation
   21,811 : 32,715.78 = 7,020.76 : x
2. Step 2: Convert to fraction form
   21,811/32,715.78 = 7,020.76/x
3. Step 3: Cross multiply
   21,811x = 32,715.78 × 7,020.76
4. Step 4: Simplify right side
   21,811x = 229,689,639.59
5. Step 5: Solve for x
   x = 229,689,639.59/21,811
6. Step 6: Final answer
   x = 10,530.91