Finding the Fourth Proportional to 25,458.60, 35,131.94 and 14,128.59

Step by Step Solution

1. Step 1: Write the proportion equation
   25,458.60 : 35,131.94 = 14,128.59 : x
2. Step 2: Convert to fraction form
   25,458.60/35,131.94 = 14,128.59/x
3. Step 3: Cross multiply
   25,458.60x = 35,131.94 × 14,128.59
4. Step 4: Simplify right side
   25,458.60x = 496,364,776.16
5. Step 5: Solve for x
   x = 496,364,776.16/25,458.60
6. Step 6: Final answer
   x = 19,496.94