Finding the Fourth Proportional to 21,019.22, 31,396.22 and 17,697.71

Step by Step Solution

1. Step 1: Write the proportion equation
   21,019.22 : 31,396.22 = 17,697.71 : x
2. Step 2: Convert to fraction form
   21,019.22/31,396.22 = 17,697.71/x
3. Step 3: Cross multiply
   21,019.22x = 31,396.22 × 17,697.71
4. Step 4: Simplify right side
   21,019.22x = 555,641,275.15
5. Step 5: Solve for x
   x = 555,641,275.15/21,019.22
6. Step 6: Final answer
   x = 26,434.92