Finding the Fourth Proportional to 16,780.86, 25,188.76 and 16,404.34

Step by Step Solution

1. Step 1: Write the proportion equation
   16,780.86 : 25,188.76 = 16,404.34 : x
2. Step 2: Convert to fraction form
   16,780.86/25,188.76 = 16,404.34/x
3. Step 3: Cross multiply
   16,780.86x = 25,188.76 × 16,404.34
4. Step 4: Simplify right side
   16,780.86x = 413,204,983.22
5. Step 5: Solve for x
   x = 413,204,983.22/16,780.86
6. Step 6: Final answer
   x = 24,623.59