Finding the Fourth Proportional to 16,698.42, 23,039.73 and 9,986.22

Step by Step Solution

1. Step 1: Write the proportion equation
   16,698.42 : 23,039.73 = 9,986.22 : x
2. Step 2: Convert to fraction form
   16,698.42/23,039.73 = 9,986.22/x
3. Step 3: Cross multiply
   16,698.42x = 23,039.73 × 9,986.22
4. Step 4: Simplify right side
   16,698.42x = 230,079,812.52
5. Step 5: Solve for x
   x = 230,079,812.52/16,698.42
6. Step 6: Final answer
   x = 13,778.54