Finding the Fourth Proportional to 21,760.20, 32,640.71 and 17,429.94

Step by Step Solution

1. Step 1: Write the proportion equation
   21,760.20 : 32,640.71 = 17,429.94 : x
2. Step 2: Convert to fraction form
   21,760.20/32,640.71 = 17,429.94/x
3. Step 3: Cross multiply
   21,760.20x = 32,640.71 × 17,429.94
4. Step 4: Simplify right side
   21,760.20x = 568,925,529.71
5. Step 5: Solve for x
   x = 568,925,529.71/21,760.20
6. Step 6: Final answer
   x = 26,145.23