Finding the Fourth Proportional to 21,443.31, 32,158.87 and 13,533.96

Step by Step Solution

1. Step 1: Write the proportion equation
   21,443.31 : 32,158.87 = 13,533.96 : x
2. Step 2: Convert to fraction form
   21,443.31/32,158.87 = 13,533.96/x
3. Step 3: Cross multiply
   21,443.31x = 32,158.87 × 13,533.96
4. Step 4: Simplify right side
   21,443.31x = 435,236,860.23
5. Step 5: Solve for x
   x = 435,236,860.23/21,443.31
6. Step 6: Final answer
   x = 20,297.09