Finding the Fourth Proportional to 2,709.72, 4,064.31 and 1,247.94

Step by Step Solution

1. Step 1: Write the proportion equation
   2,709.72 : 4,064.31 = 1,247.94 : x
2. Step 2: Convert to fraction form
   2,709.72/4,064.31 = 1,247.94/x
3. Step 3: Cross multiply
   2,709.72x = 4,064.31 × 1,247.94
4. Step 4: Simplify right side
   2,709.72x = 5,072,015.02
5. Step 5: Solve for x
   x = 5,072,015.02/2,709.72
6. Step 6: Final answer
   x = 1,871.79