Finding the Fourth Proportional to 10,638.54, 15,958.72 and 3,243.07

Step by Step Solution

1. Step 1: Write the proportion equation
   10,638.54 : 15,958.72 = 3,243.07 : x
2. Step 2: Convert to fraction form
   10,638.54/15,958.72 = 3,243.07/x
3. Step 3: Cross multiply
   10,638.54x = 15,958.72 × 3,243.07
4. Step 4: Simplify right side
   10,638.54x = 51,755,270.07
5. Step 5: Solve for x
   x = 51,755,270.07/10,638.54
6. Step 6: Final answer
   x = 4,864.88