Finding the Fourth Proportional to 1,540.30, 2,309.91 and 718.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,540.30 : 2,309.91 = 718.42 : x
2. Step 2: Convert to fraction form
   1,540.30/2,309.91 = 718.42/x
3. Step 3: Cross multiply
   1,540.30x = 2,309.91 × 718.42
4. Step 4: Simplify right side
   1,540.30x = 1,659,485.54
5. Step 5: Solve for x
   x = 1,659,485.54/1,540.30
6. Step 6: Final answer
   x = 1,077.38