Finding the Fourth Proportional to 1,308.56, 1,805.69 and 718.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,308.56 : 1,805.69 = 718.94 : x
2. Step 2: Convert to fraction form
   1,308.56/1,805.69 = 718.94/x
3. Step 3: Cross multiply
   1,308.56x = 1,805.69 × 718.94
4. Step 4: Simplify right side
   1,308.56x = 1,298,189.08
5. Step 5: Solve for x
   x = 1,298,189.08/1,308.56
6. Step 6: Final answer
   x = 992.08