Finding the Fourth Proportional to 2,299.72, 3,173.61 and 1,251.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,299.72 : 3,173.61 = 1,251.78 : x
2. Step 2: Convert to fraction form
   2,299.72/3,173.61 = 1,251.78/x
3. Step 3: Cross multiply
   2,299.72x = 3,173.61 × 1,251.78
4. Step 4: Simplify right side
   2,299.72x = 3,972,661.53
5. Step 5: Solve for x
   x = 3,972,661.53/2,299.72
6. Step 6: Final answer
   x = 1,727.45