Finding the Fourth Proportional to 23,823.78, 32,876.76 and 13,215

Step by Step Solution

1. Step 1: Write the proportion equation
   23,823.78 : 32,876.76 = 13,215 : x
2. Step 2: Convert to fraction form
   23,823.78/32,876.76 = 13,215/x
3. Step 3: Cross multiply
   23,823.78x = 32,876.76 × 13,215
4. Step 4: Simplify right side
   23,823.78x = 434,466,383.40
5. Step 5: Solve for x
   x = 434,466,383.40/23,823.78
6. Step 6: Final answer
   x = 18,236.67