Finding the Fourth Proportional to 16,808.72, 23,180.78 and 13,806.86

Step by Step Solution

1. Step 1: Write the proportion equation
   16,808.72 : 23,180.78 = 13,806.86 : x
2. Step 2: Convert to fraction form
   16,808.72/23,180.78 = 13,806.86/x
3. Step 3: Cross multiply
   16,808.72x = 23,180.78 × 13,806.86
4. Step 4: Simplify right side
   16,808.72x = 320,053,702.76
5. Step 5: Solve for x
   x = 320,053,702.76/16,808.72
6. Step 6: Final answer
   x = 19,040.94