Finding the Fourth Proportional to 1,308.74, 1,806.17 and 719.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,308.74 : 1,806.17 = 719.37 : x
2. Step 2: Convert to fraction form
   1,308.74/1,806.17 = 719.37/x
3. Step 3: Cross multiply
   1,308.74x = 1,806.17 × 719.37
4. Step 4: Simplify right side
   1,308.74x = 1,299,300.92
5. Step 5: Solve for x
   x = 1,299,300.92/1,308.74
6. Step 6: Final answer
   x = 992.79