Finding the Fourth Proportional to 16,172.16, 22,317.89 and 9,799.79

Step by Step Solution

1. Step 1: Write the proportion equation
   16,172.16 : 22,317.89 = 9,799.79 : x
2. Step 2: Convert to fraction form
   16,172.16/22,317.89 = 9,799.79/x
3. Step 3: Cross multiply
   16,172.16x = 22,317.89 × 9,799.79
4. Step 4: Simplify right side
   16,172.16x = 218,710,474.65
5. Step 5: Solve for x
   x = 218,710,474.65/16,172.16
6. Step 6: Final answer
   x = 13,523.89