Finding the Fourth Proportional to 3,986.72, 5,979.84 and 1,250.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,986.72 : 5,979.84 = 1,250.72 : x
2. Step 2: Convert to fraction form
   3,986.72/5,979.84 = 1,250.72/x
3. Step 3: Cross multiply
   3,986.72x = 5,979.84 × 1,250.72
4. Step 4: Simplify right side
   3,986.72x = 7,479,105.48
5. Step 5: Solve for x
   x = 7,479,105.48/3,986.72
6. Step 6: Final answer
   x = 1,876.00