Finding the Fourth Proportional to 16,651.78, 24,978.48 and 5,558.56

Step by Step Solution

1. Step 1: Write the proportion equation
   16,651.78 : 24,978.48 = 5,558.56 : x
2. Step 2: Convert to fraction form
   16,651.78/24,978.48 = 5,558.56/x
3. Step 3: Cross multiply
   16,651.78x = 24,978.48 × 5,558.56
4. Step 4: Simplify right side
   16,651.78x = 138,844,379.79
5. Step 5: Solve for x
   x = 138,844,379.79/16,651.78
6. Step 6: Final answer
   x = 8,338.11