Finding the Fourth Proportional to 10,985.42, 16,477.98 and 2,665.50

Step by Step Solution

1. Step 1: Write the proportion equation
   10,985.42 : 16,477.98 = 2,665.50 : x
2. Step 2: Convert to fraction form
   10,985.42/16,477.98 = 2,665.50/x
3. Step 3: Cross multiply
   10,985.42x = 16,477.98 × 2,665.50
4. Step 4: Simplify right side
   10,985.42x = 43,922,055.69
5. Step 5: Solve for x
   x = 43,922,055.69/10,985.42
6. Step 6: Final answer
   x = 3,998.21