Finding the Fourth Proportional to 16,690.52, 23,035.74 and 9,621.05

Step by Step Solution

1. Step 1: Write the proportion equation
   16,690.52 : 23,035.74 = 9,621.05 : x
2. Step 2: Convert to fraction form
   16,690.52/23,035.74 = 9,621.05/x
3. Step 3: Cross multiply
   16,690.52x = 23,035.74 × 9,621.05
4. Step 4: Simplify right side
   16,690.52x = 221,628,006.33
5. Step 5: Solve for x
   x = 221,628,006.33/16,690.52
6. Step 6: Final answer
   x = 13,278.68