Finding the Fourth Proportional to 21,300.38, 29,375.34 and 13,343.30

Step by Step Solution

1. Step 1: Write the proportion equation
   21,300.38 : 29,375.34 = 13,343.30 : x
2. Step 2: Convert to fraction form
   21,300.38/29,375.34 = 13,343.30/x
3. Step 3: Cross multiply
   21,300.38x = 29,375.34 × 13,343.30
4. Step 4: Simplify right side
   21,300.38x = 391,963,974.22
5. Step 5: Solve for x
   x = 391,963,974.22/21,300.38
6. Step 6: Final answer
   x = 18,401.74