Finding the Fourth Proportional to 10,680.66, 16,019.27 and 3,660.39

Step by Step Solution

1. Step 1: Write the proportion equation
   10,680.66 : 16,019.27 = 3,660.39 : x
2. Step 2: Convert to fraction form
   10,680.66/16,019.27 = 3,660.39/x
3. Step 3: Cross multiply
   10,680.66x = 16,019.27 × 3,660.39
4. Step 4: Simplify right side
   10,680.66x = 58,636,775.72
5. Step 5: Solve for x
   x = 58,636,775.72/10,680.66
6. Step 6: Final answer
   x = 5,490.00