Finding the Fourth Proportional to 21,813.96, 32,504.50 and 20,756.10

Step by Step Solution

1. Step 1: Write the proportion equation
   21,813.96 : 32,504.50 = 20,756.10 : x
2. Step 2: Convert to fraction form
   21,813.96/32,504.50 = 20,756.10/x
3. Step 3: Cross multiply
   21,813.96x = 32,504.50 × 20,756.10
4. Step 4: Simplify right side
   21,813.96x = 674,666,652.45
5. Step 5: Solve for x
   x = 674,666,652.45/21,813.96
6. Step 6: Final answer
   x = 30,928.21