Finding the Fourth Proportional to 25,689.89, 35,451.34 and 14,359.43

Step by Step Solution

1. Step 1: Write the proportion equation
   25,689.89 : 35,451.34 = 14,359.43 : x
2. Step 2: Convert to fraction form
   25,689.89/35,451.34 = 14,359.43/x
3. Step 3: Cross multiply
   25,689.89x = 35,451.34 × 14,359.43
4. Step 4: Simplify right side
   25,689.89x = 509,061,035.14
5. Step 5: Solve for x
   x = 509,061,035.14/25,689.89
6. Step 6: Final answer
   x = 19,815.62