Finding the Fourth Proportional to 1,806.29, 2,491.31 and 1,247.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,806.29 : 2,491.31 = 1,247.69 : x
2. Step 2: Convert to fraction form
   1,806.29/2,491.31 = 1,247.69/x
3. Step 3: Cross multiply
   1,806.29x = 2,491.31 × 1,247.69
4. Step 4: Simplify right side
   1,806.29x = 3,108,363.88
5. Step 5: Solve for x
   x = 3,108,363.88/1,806.29
6. Step 6: Final answer
   x = 1,720.86