Finding the Fourth Proportional to 10,985.83, 16,478.62 and 2,665.94

Step by Step Solution

1. Step 1: Write the proportion equation
   10,985.83 : 16,478.62 = 2,665.94 : x
2. Step 2: Convert to fraction form
   10,985.83/16,478.62 = 2,665.94/x
3. Step 3: Cross multiply
   10,985.83x = 16,478.62 × 2,665.94
4. Step 4: Simplify right side
   10,985.83x = 43,930,923.14
5. Step 5: Solve for x
   x = 43,930,923.14/10,985.83
6. Step 6: Final answer
   x = 3,998.87