Finding the Fourth Proportional to 2,615.38, 3,923.50 and 1,299.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,615.38 : 3,923.50 = 1,299.18 : x
2. Step 2: Convert to fraction form
   2,615.38/3,923.50 = 1,299.18/x
3. Step 3: Cross multiply
   2,615.38x = 3,923.50 × 1,299.18
4. Step 4: Simplify right side
   2,615.38x = 5,097,332.73
5. Step 5: Solve for x
   x = 5,097,332.73/2,615.38
6. Step 6: Final answer
   x = 1,948.98