Finding the Fourth Proportional to 21,172.08, 31,758.89 and 8,025.42

Step by Step Solution

1. Step 1: Write the proportion equation
   21,172.08 : 31,758.89 = 8,025.42 : x
2. Step 2: Convert to fraction form
   21,172.08/31,758.89 = 8,025.42/x
3. Step 3: Cross multiply
   21,172.08x = 31,758.89 × 8,025.42
4. Step 4: Simplify right side
   21,172.08x = 254,878,390.86
5. Step 5: Solve for x
   x = 254,878,390.86/21,172.08
6. Step 6: Final answer
   x = 12,038.42