Finding the Fourth Proportional to 10,411.55, 14,372.69 and 6,639.89

Step by Step Solution

1. Step 1: Write the proportion equation
   10,411.55 : 14,372.69 = 6,639.89 : x
2. Step 2: Convert to fraction form
   10,411.55/14,372.69 = 6,639.89/x
3. Step 3: Cross multiply
   10,411.55x = 14,372.69 × 6,639.89
4. Step 4: Simplify right side
   10,411.55x = 95,433,093.74
5. Step 5: Solve for x
   x = 95,433,093.74/10,411.55
6. Step 6: Final answer
   x = 9,166.08