Finding the Fourth Proportional to 13,839.86, 19,100.54 and 7,872.68

Step by Step Solution

1. Step 1: Write the proportion equation
   13,839.86 : 19,100.54 = 7,872.68 : x
2. Step 2: Convert to fraction form
   13,839.86/19,100.54 = 7,872.68/x
3. Step 3: Cross multiply
   13,839.86x = 19,100.54 × 7,872.68
4. Step 4: Simplify right side
   13,839.86x = 150,372,506.68
5. Step 5: Solve for x
   x = 150,372,506.68/13,839.86
6. Step 6: Final answer
   x = 10,865.17