Finding the Fourth Proportional to 21,791.31, 30,066.03 and 13,294.82

Step by Step Solution

1. Step 1: Write the proportion equation
   21,791.31 : 30,066.03 = 13,294.82 : x
2. Step 2: Convert to fraction form
   21,791.31/30,066.03 = 13,294.82/x
3. Step 3: Cross multiply
   21,791.31x = 30,066.03 × 13,294.82
4. Step 4: Simplify right side
   21,791.31x = 399,722,306.63
5. Step 5: Solve for x
   x = 399,722,306.63/21,791.31
6. Step 6: Final answer
   x = 18,343.20