Finding the Fourth Proportional to 10,685.67, 16,028.74 and 3,665.66

Step by Step Solution

1. Step 1: Write the proportion equation
   10,685.67 : 16,028.74 = 3,665.66 : x
2. Step 2: Convert to fraction form
   10,685.67/16,028.74 = 3,665.66/x
3. Step 3: Cross multiply
   10,685.67x = 16,028.74 × 3,665.66
4. Step 4: Simplify right side
   10,685.67x = 58,755,814.89
5. Step 5: Solve for x
   x = 58,755,814.89/10,685.67
6. Step 6: Final answer
   x = 5,498.56