Finding the Fourth Proportional to 21,340.56, 29,433.33 and 13,684.56

Step by Step Solution

1. Step 1: Write the proportion equation
   21,340.56 : 29,433.33 = 13,684.56 : x
2. Step 2: Convert to fraction form
   21,340.56/29,433.33 = 13,684.56/x
3. Step 3: Cross multiply
   21,340.56x = 29,433.33 × 13,684.56
4. Step 4: Simplify right side
   21,340.56x = 402,782,170.38
5. Step 5: Solve for x
   x = 402,782,170.38/21,340.56
6. Step 6: Final answer
   x = 18,874.02