Finding the Fourth Proportional to 21,066.36, 31,521.72 and 17,333.88

Step by Step Solution

1. Step 1: Write the proportion equation
   21,066.36 : 31,521.72 = 17,333.88 : x
2. Step 2: Convert to fraction form
   21,066.36/31,521.72 = 17,333.88/x
3. Step 3: Cross multiply
   21,066.36x = 31,521.72 × 17,333.88
4. Step 4: Simplify right side
   21,066.36x = 546,393,711.87
5. Step 5: Solve for x
   x = 546,393,711.87/21,066.36
6. Step 6: Final answer
   x = 25,936.79