Finding the Fourth Proportional to 2,551.34, 3,519.37 and 1,665.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,551.34 : 3,519.37 = 1,665.61 : x
2. Step 2: Convert to fraction form
   2,551.34/3,519.37 = 1,665.61/x
3. Step 3: Cross multiply
   2,551.34x = 3,519.37 × 1,665.61
4. Step 4: Simplify right side
   2,551.34x = 5,861,884.90
5. Step 5: Solve for x
   x = 5,861,884.90/2,551.34
6. Step 6: Final answer
   x = 2,297.57