Finding the Fourth Proportional to 2,299.20, 3,172.82 and 1,512.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,299.20 : 3,172.82 = 1,512.69 : x
2. Step 2: Convert to fraction form
   2,299.20/3,172.82 = 1,512.69/x
3. Step 3: Cross multiply
   2,299.20x = 3,172.82 × 1,512.69
4. Step 4: Simplify right side
   2,299.20x = 4,799,485.52
5. Step 5: Solve for x
   x = 4,799,485.52/2,299.20
6. Step 6: Final answer
   x = 2,087.46