Finding the Fourth Proportional to 13,872.85, 19,143.71 and 7,903.69

Step by Step Solution

1. Step 1: Write the proportion equation
   13,872.85 : 19,143.71 = 7,903.69 : x
2. Step 2: Convert to fraction form
   13,872.85/19,143.71 = 7,903.69/x
3. Step 3: Cross multiply
   13,872.85x = 19,143.71 × 7,903.69
4. Step 4: Simplify right side
   13,872.85x = 151,305,949.29
5. Step 5: Solve for x
   x = 151,305,949.29/13,872.85
6. Step 6: Final answer
   x = 10,906.62