Finding the Fourth Proportional to 16,778.72, 25,164.84 and 6,388.04

Step by Step Solution

1. Step 1: Write the proportion equation
   16,778.72 : 25,164.84 = 6,388.04 : x
2. Step 2: Convert to fraction form
   16,778.72/25,164.84 = 6,388.04/x
3. Step 3: Cross multiply
   16,778.72x = 25,164.84 × 6,388.04
4. Step 4: Simplify right side
   16,778.72x = 160,754,004.51
5. Step 5: Solve for x
   x = 160,754,004.51/16,778.72
6. Step 6: Final answer
   x = 9,580.83