Finding the Fourth Proportional to 2,390.24, 3,299.88 and 1,551.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,390.24 : 3,299.88 = 1,551.69 : x
2. Step 2: Convert to fraction form
   2,390.24/3,299.88 = 1,551.69/x
3. Step 3: Cross multiply
   2,390.24x = 3,299.88 × 1,551.69
4. Step 4: Simplify right side
   2,390.24x = 5,120,378.42
5. Step 5: Solve for x
   x = 5,120,378.42/2,390.24
6. Step 6: Final answer
   x = 2,142.20