Finding the Fourth Proportional to 35,825.16, 53,761.05 and 13,638.72

Step by Step Solution

1. Step 1: Write the proportion equation
   35,825.16 : 53,761.05 = 13,638.72 : x
2. Step 2: Convert to fraction form
   35,825.16/53,761.05 = 13,638.72/x
3. Step 3: Cross multiply
   35,825.16x = 53,761.05 × 13,638.72
4. Step 4: Simplify right side
   35,825.16x = 733,231,907.86
5. Step 5: Solve for x
   x = 733,231,907.86/35,825.16
6. Step 6: Final answer
   x = 20,466.95