Finding the Fourth Proportional to 2,012.31, 3,018.73 and 713.79

Step by Step Solution

1. Step 1: Write the proportion equation
   2,012.31 : 3,018.73 = 713.79 : x
2. Step 2: Convert to fraction form
   2,012.31/3,018.73 = 713.79/x
3. Step 3: Cross multiply
   2,012.31x = 3,018.73 × 713.79
4. Step 4: Simplify right side
   2,012.31x = 2,154,745.05
5. Step 5: Solve for x
   x = 2,154,745.05/2,012.31
6. Step 6: Final answer
   x = 1,070.78