Finding the Fourth Proportional to 25,914.96, 38,821.59 and 13,443.12

Step by Step Solution

1. Step 1: Write the proportion equation
   25,914.96 : 38,821.59 = 13,443.12 : x
2. Step 2: Convert to fraction form
   25,914.96/38,821.59 = 13,443.12/x
3. Step 3: Cross multiply
   25,914.96x = 38,821.59 × 13,443.12
4. Step 4: Simplify right side
   25,914.96x = 521,883,292.96
5. Step 5: Solve for x
   x = 521,883,292.96/25,914.96
6. Step 6: Final answer
   x = 20,138.30