Finding the Fourth Proportional to 25,789.78, 35,591.40 and 14,458.72

Step by Step Solution

1. Step 1: Write the proportion equation
   25,789.78 : 35,591.40 = 14,458.72 : x
2. Step 2: Convert to fraction form
   25,789.78/35,591.40 = 14,458.72/x
3. Step 3: Cross multiply
   25,789.78x = 35,591.40 × 14,458.72
4. Step 4: Simplify right side
   25,789.78x = 514,606,087.01
5. Step 5: Solve for x
   x = 514,606,087.01/25,789.78
6. Step 6: Final answer
   x = 19,953.88