Finding the Fourth Proportional to 21,065.27, 31,591.55 and 17,358.30

Step by Step Solution

1. Step 1: Write the proportion equation
   21,065.27 : 31,591.55 = 17,358.30 : x
2. Step 2: Convert to fraction form
   21,065.27/31,591.55 = 17,358.30/x
3. Step 3: Cross multiply
   21,065.27x = 31,591.55 × 17,358.30
4. Step 4: Simplify right side
   21,065.27x = 548,375,645.76
5. Step 5: Solve for x
   x = 548,375,645.76/21,065.27
6. Step 6: Final answer
   x = 26,032.22