Finding the Fourth Proportional to 35,824.72, 53,760.48 and 13,638.28

Step by Step Solution

1. Step 1: Write the proportion equation
   35,824.72 : 53,760.48 = 13,638.28 : x
2. Step 2: Convert to fraction form
   35,824.72/53,760.48 = 13,638.28/x
3. Step 3: Cross multiply
   35,824.72x = 53,760.48 × 13,638.28
4. Step 4: Simplify right side
   35,824.72x = 733,200,479.17
5. Step 5: Solve for x
   x = 733,200,479.17/35,824.72
6. Step 6: Final answer
   x = 20,466.33