Finding the Fourth Proportional to 25,019.38, 34,525.50 and 13,689.10

Step by Step Solution

1. Step 1: Write the proportion equation
   25,019.38 : 34,525.50 = 13,689.10 : x
2. Step 2: Convert to fraction form
   25,019.38/34,525.50 = 13,689.10/x
3. Step 3: Cross multiply
   25,019.38x = 34,525.50 × 13,689.10
4. Step 4: Simplify right side
   25,019.38x = 472,623,022.05
5. Step 5: Solve for x
   x = 472,623,022.05/25,019.38
6. Step 6: Final answer
   x = 18,890.28