Finding the Fourth Proportional to 21,300.75, 29,383.85 and 16,256.18

Step by Step Solution

1. Step 1: Write the proportion equation
   21,300.75 : 29,383.85 = 16,256.18 : x
2. Step 2: Convert to fraction form
   21,300.75/29,383.85 = 16,256.18/x
3. Step 3: Cross multiply
   21,300.75x = 29,383.85 × 16,256.18
4. Step 4: Simplify right side
   21,300.75x = 477,669,268.79
5. Step 5: Solve for x
   x = 477,669,268.79/21,300.75
6. Step 6: Final answer
   x = 22,425.00