Finding the Fourth Proportional to 16,643.79, 22,968.82 and 9,090.17

Step by Step Solution

1. Step 1: Write the proportion equation
   16,643.79 : 22,968.82 = 9,090.17 : x
2. Step 2: Convert to fraction form
   16,643.79/22,968.82 = 9,090.17/x
3. Step 3: Cross multiply
   16,643.79x = 22,968.82 × 9,090.17
4. Step 4: Simplify right side
   16,643.79x = 208,790,478.50
5. Step 5: Solve for x
   x = 208,790,478.50/16,643.79
6. Step 6: Final answer
   x = 12,544.65