Finding the Fourth Proportional to 16,753.89, 25,081.63 and 13,219.15

Step by Step Solution

1. Step 1: Write the proportion equation
   16,753.89 : 25,081.63 = 13,219.15 : x
2. Step 2: Convert to fraction form
   16,753.89/25,081.63 = 13,219.15/x
3. Step 3: Cross multiply
   16,753.89x = 25,081.63 × 13,219.15
4. Step 4: Simplify right side
   16,753.89x = 331,557,829.21
5. Step 5: Solve for x
   x = 331,557,829.21/16,753.89
6. Step 6: Final answer
   x = 19,789.90