Finding the Fourth Proportional to 2,407.15, 3,610.56 and 675.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,407.15 : 3,610.56 = 675.78 : x
2. Step 2: Convert to fraction form
   2,407.15/3,610.56 = 675.78/x
3. Step 3: Cross multiply
   2,407.15x = 3,610.56 × 675.78
4. Step 4: Simplify right side
   2,407.15x = 2,439,926.18
5. Step 5: Solve for x
   x = 2,439,926.18/2,407.15
6. Step 6: Final answer
   x = 1,013.62