Finding the Fourth Proportional to 1,308.88, 1,806.22 and 719.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,308.88 : 1,806.22 = 719.42 : x
2. Step 2: Convert to fraction form
   1,308.88/1,806.22 = 719.42/x
3. Step 3: Cross multiply
   1,308.88x = 1,806.22 × 719.42
4. Step 4: Simplify right side
   1,308.88x = 1,299,430.79
5. Step 5: Solve for x
   x = 1,299,430.79/1,308.88
6. Step 6: Final answer
   x = 992.78