Finding the Fourth Proportional to 17,458.86, 25,990.86 and 17,355.09

Step by Step Solution

1. Step 1: Write the proportion equation
   17,458.86 : 25,990.86 = 17,355.09 : x
2. Step 2: Convert to fraction form
   17,458.86/25,990.86 = 17,355.09/x
3. Step 3: Cross multiply
   17,458.86x = 25,990.86 × 17,355.09
4. Step 4: Simplify right side
   17,458.86x = 451,073,714.48
5. Step 5: Solve for x
   x = 451,073,714.48/17,458.86
6. Step 6: Final answer
   x = 25,836.38