Finding the Fourth Proportional to 16,804.18, 25,221.83 and 8,490.05

Step by Step Solution

1. Step 1: Write the proportion equation
   16,804.18 : 25,221.83 = 8,490.05 : x
2. Step 2: Convert to fraction form
   16,804.18/25,221.83 = 8,490.05/x
3. Step 3: Cross multiply
   16,804.18x = 25,221.83 × 8,490.05
4. Step 4: Simplify right side
   16,804.18x = 214,134,429.23
5. Step 5: Solve for x
   x = 214,134,429.23/16,804.18
6. Step 6: Final answer
   x = 12,742.93