Finding the Fourth Proportional to 16,648.49, 24,979.28 and 7,890.77

Step by Step Solution

1. Step 1: Write the proportion equation
   16,648.49 : 24,979.28 = 7,890.77 : x
2. Step 2: Convert to fraction form
   16,648.49/24,979.28 = 7,890.77/x
3. Step 3: Cross multiply
   16,648.49x = 24,979.28 × 7,890.77
4. Step 4: Simplify right side
   16,648.49x = 197,105,588.90
5. Step 5: Solve for x
   x = 197,105,588.90/16,648.49
6. Step 6: Final answer
   x = 11,839.25