Finding the Fourth Proportional to 1,308.76, 1,806.12 and 719.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,308.76 : 1,806.12 = 719.34 : x
2. Step 2: Convert to fraction form
   1,308.76/1,806.12 = 719.34/x
3. Step 3: Cross multiply
   1,308.76x = 1,806.12 × 719.34
4. Step 4: Simplify right side
   1,308.76x = 1,299,214.36
5. Step 5: Solve for x
   x = 1,299,214.36/1,308.76
6. Step 6: Final answer
   x = 992.71