Finding the Fourth Proportional to 21,640.42, 32,449.02 and 11,106.10

Step by Step Solution

1. Step 1: Write the proportion equation
   21,640.42 : 32,449.02 = 11,106.10 : x
2. Step 2: Convert to fraction form
   21,640.42/32,449.02 = 11,106.10/x
3. Step 3: Cross multiply
   21,640.42x = 32,449.02 × 11,106.10
4. Step 4: Simplify right side
   21,640.42x = 360,382,061.02
5. Step 5: Solve for x
   x = 360,382,061.02/21,640.42
6. Step 6: Final answer
   x = 16,653.19