Finding the Fourth Proportional to 13,139.34, 19,672.41 and 10,223.34

Step by Step Solution

1. Step 1: Write the proportion equation
   13,139.34 : 19,672.41 = 10,223.34 : x
2. Step 2: Convert to fraction form
   13,139.34/19,672.41 = 10,223.34/x
3. Step 3: Cross multiply
   13,139.34x = 19,672.41 × 10,223.34
4. Step 4: Simplify right side
   13,139.34x = 201,117,736.05
5. Step 5: Solve for x
   x = 201,117,736.05/13,139.34
6. Step 6: Final answer
   x = 15,306.53