Finding the Fourth Proportional to 16,610.80, 24,923.40 and 8,402.80

Step by Step Solution

1. Step 1: Write the proportion equation
   16,610.80 : 24,923.40 = 8,402.80 : x
2. Step 2: Convert to fraction form
   16,610.80/24,923.40 = 8,402.80/x
3. Step 3: Cross multiply
   16,610.80x = 24,923.40 × 8,402.80
4. Step 4: Simplify right side
   16,610.80x = 209,426,345.52
5. Step 5: Solve for x
   x = 209,426,345.52/16,610.80
6. Step 6: Final answer
   x = 12,607.84