Finding the Fourth Proportional to 21,582.89, 29,801.28 and 16,880.57

Step by Step Solution

1. Step 1: Write the proportion equation
   21,582.89 : 29,801.28 = 16,880.57 : x
2. Step 2: Convert to fraction form
   21,582.89/29,801.28 = 16,880.57/x
3. Step 3: Cross multiply
   21,582.89x = 29,801.28 × 16,880.57
4. Step 4: Simplify right side
   21,582.89x = 503,062,359.72
5. Step 5: Solve for x
   x = 503,062,359.72/21,582.89
6. Step 6: Final answer
   x = 23,308.39