Finding the Fourth Proportional to 21,274.52, 31,911.42 and 8,801.24

Step by Step Solution

1. Step 1: Write the proportion equation
   21,274.52 : 31,911.42 = 8,801.24 : x
2. Step 2: Convert to fraction form
   21,274.52/31,911.42 = 8,801.24/x
3. Step 3: Cross multiply
   21,274.52x = 31,911.42 × 8,801.24
4. Step 4: Simplify right side
   21,274.52x = 280,860,066.16
5. Step 5: Solve for x
   x = 280,860,066.16/21,274.52
6. Step 6: Final answer
   x = 13,201.71