Finding the Fourth Proportional to 10,153.72, 14,007.89 and 7,911.71

Step by Step Solution

1. Step 1: Write the proportion equation
   10,153.72 : 14,007.89 = 7,911.71 : x
2. Step 2: Convert to fraction form
   10,153.72/14,007.89 = 7,911.71/x
3. Step 3: Cross multiply
   10,153.72x = 14,007.89 × 7,911.71
4. Step 4: Simplify right side
   10,153.72x = 110,826,363.39
5. Step 5: Solve for x
   x = 110,826,363.39/10,153.72
6. Step 6: Final answer
   x = 10,914.85