Finding the Fourth Proportional to 16,978.48, 25,463.34 and 5,285.68

Step by Step Solution

1. Step 1: Write the proportion equation
   16,978.48 : 25,463.34 = 5,285.68 : x
2. Step 2: Convert to fraction form
   16,978.48/25,463.34 = 5,285.68/x
3. Step 3: Cross multiply
   16,978.48x = 25,463.34 × 5,285.68
4. Step 4: Simplify right side
   16,978.48x = 134,591,066.97
5. Step 5: Solve for x
   x = 134,591,066.97/16,978.48
6. Step 6: Final answer
   x = 7,927.16