Finding the Fourth Proportional to 2,669.31, 4,018.77 and 2,087.46

Step by Step Solution

1. Step 1: Write the proportion equation
   2,669.31 : 4,018.77 = 2,087.46 : x
2. Step 2: Convert to fraction form
   2,669.31/4,018.77 = 2,087.46/x
3. Step 3: Cross multiply
   2,669.31x = 4,018.77 × 2,087.46
4. Step 4: Simplify right side
   2,669.31x = 8,389,021.62
5. Step 5: Solve for x
   x = 8,389,021.62/2,669.31
6. Step 6: Final answer
   x = 3,142.77