Finding the Fourth Proportional to 16,659.99, 22,991.30 and 9,106.16

Step by Step Solution

1. Step 1: Write the proportion equation
   16,659.99 : 22,991.30 = 9,106.16 : x
2. Step 2: Convert to fraction form
   16,659.99/22,991.30 = 9,106.16/x
3. Step 3: Cross multiply
   16,659.99x = 22,991.30 × 9,106.16
4. Step 4: Simplify right side
   16,659.99x = 209,362,364.22
5. Step 5: Solve for x
   x = 209,362,364.22/16,659.99
6. Step 6: Final answer
   x = 12,566.78