Finding the Fourth Proportional to 16,779.39, 25,153.37 and 5,678.31

Step by Step Solution

1. Step 1: Write the proportion equation
   16,779.39 : 25,153.37 = 5,678.31 : x
2. Step 2: Convert to fraction form
   16,779.39/25,153.37 = 5,678.31/x
3. Step 3: Cross multiply
   16,779.39x = 25,153.37 × 5,678.31
4. Step 4: Simplify right side
   16,779.39x = 142,828,578.14
5. Step 5: Solve for x
   x = 142,828,578.14/16,779.39
6. Step 6: Final answer
   x = 8,512.14