Finding the Fourth Proportional to 16,780.96, 25,155.71 and 5,679.88

Step by Step Solution

1. Step 1: Write the proportion equation
   16,780.96 : 25,155.71 = 5,679.88 : x
2. Step 2: Convert to fraction form
   16,780.96/25,155.71 = 5,679.88/x
3. Step 3: Cross multiply
   16,780.96x = 25,155.71 × 5,679.88
4. Step 4: Simplify right side
   16,780.96x = 142,881,414.11
5. Step 5: Solve for x
   x = 142,881,414.11/16,780.96
6. Step 6: Final answer
   x = 8,514.50