Finding the Fourth Proportional to 16,697.77, 23,043.20 and 9,143.98

Step by Step Solution

1. Step 1: Write the proportion equation
   16,697.77 : 23,043.20 = 9,143.98 : x
2. Step 2: Convert to fraction form
   16,697.77/23,043.20 = 9,143.98/x
3. Step 3: Cross multiply
   16,697.77x = 23,043.20 × 9,143.98
4. Step 4: Simplify right side
   16,697.77x = 210,706,559.94
5. Step 5: Solve for x
   x = 210,706,559.94/16,697.77
6. Step 6: Final answer
   x = 12,618.84