Finding the Fourth Proportional to 1,540.82, 2,309.63 and 718.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,540.82 : 2,309.63 = 718.43 : x
2. Step 2: Convert to fraction form
   1,540.82/2,309.63 = 718.43/x
3. Step 3: Cross multiply
   1,540.82x = 2,309.63 × 718.43
4. Step 4: Simplify right side
   1,540.82x = 1,659,292.34
5. Step 5: Solve for x
   x = 1,659,292.34/1,540.82
6. Step 6: Final answer
   x = 1,076.89