Finding the Fourth Proportional to 21,371.94, 32,025.51 and 13,557.06

Step by Step Solution

1. Step 1: Write the proportion equation
   21,371.94 : 32,025.51 = 13,557.06 : x
2. Step 2: Convert to fraction form
   21,371.94/32,025.51 = 13,557.06/x
3. Step 3: Cross multiply
   21,371.94x = 32,025.51 × 13,557.06
4. Step 4: Simplify right side
   21,371.94x = 434,171,760.60
5. Step 5: Solve for x
   x = 434,171,760.60/21,371.94
6. Step 6: Final answer
   x = 20,315.04