Finding the Fourth Proportional to 16,801.45, 25,196.10 and 8,478.70

Step by Step Solution

1. Step 1: Write the proportion equation
   16,801.45 : 25,196.10 = 8,478.70 : x
2. Step 2: Convert to fraction form
   16,801.45/25,196.10 = 8,478.70/x
3. Step 3: Cross multiply
   16,801.45x = 25,196.10 × 8,478.70
4. Step 4: Simplify right side
   16,801.45x = 213,630,173.07
5. Step 5: Solve for x
   x = 213,630,173.07/16,801.45
6. Step 6: Final answer
   x = 12,714.98