Finding the Fourth Proportional to 16,647.99, 24,978.53 and 7,890.27

Step by Step Solution

1. Step 1: Write the proportion equation
   16,647.99 : 24,978.53 = 7,890.27 : x
2. Step 2: Convert to fraction form
   16,647.99/24,978.53 = 7,890.27/x
3. Step 3: Cross multiply
   16,647.99x = 24,978.53 × 7,890.27
4. Step 4: Simplify right side
   16,647.99x = 197,087,345.90
5. Step 5: Solve for x
   x = 197,087,345.90/16,647.99
6. Step 6: Final answer
   x = 11,838.51