Finding the Fourth Proportional to 1,309.14, 1,806.71 and 719.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,309.14 : 1,806.71 = 719.69 : x
2. Step 2: Convert to fraction form
   1,309.14/1,806.71 = 719.69/x
3. Step 3: Cross multiply
   1,309.14x = 1,806.71 × 719.69
4. Step 4: Simplify right side
   1,309.14x = 1,300,271.12
5. Step 5: Solve for x
   x = 1,300,271.12/1,309.14
6. Step 6: Final answer
   x = 993.23