Finding the Fourth Proportional to 16,687.77, 23,028.45 and 9,977.10

Step by Step Solution

1. Step 1: Write the proportion equation
   16,687.77 : 23,028.45 = 9,977.10 : x
2. Step 2: Convert to fraction form
   16,687.77/23,028.45 = 9,977.10/x
3. Step 3: Cross multiply
   16,687.77x = 23,028.45 × 9,977.10
4. Step 4: Simplify right side
   16,687.77x = 229,757,148.50
5. Step 5: Solve for x
   x = 229,757,148.50/16,687.77
6. Step 6: Final answer
   x = 13,768.00