Finding the Fourth Proportional to 16,990.72, 23,449.98 and 9,821.01

Step by Step Solution

1. Step 1: Write the proportion equation
   16,990.72 : 23,449.98 = 9,821.01 : x
2. Step 2: Convert to fraction form
   16,990.72/23,449.98 = 9,821.01/x
3. Step 3: Cross multiply
   16,990.72x = 23,449.98 × 9,821.01
4. Step 4: Simplify right side
   16,990.72x = 230,302,488.08
5. Step 5: Solve for x
   x = 230,302,488.08/16,990.72
6. Step 6: Final answer
   x = 13,554.60