Finding the Fourth Proportional to 13,922.33, 19,187.69 and 10,139.49

Step by Step Solution

1. Step 1: Write the proportion equation
   13,922.33 : 19,187.69 = 10,139.49 : x
2. Step 2: Convert to fraction form
   13,922.33/19,187.69 = 10,139.49/x
3. Step 3: Cross multiply
   13,922.33x = 19,187.69 × 10,139.49
4. Step 4: Simplify right side
   13,922.33x = 194,553,340.18
5. Step 5: Solve for x
   x = 194,553,340.18/13,922.33
6. Step 6: Final answer
   x = 13,974.20