Finding the Fourth Proportional to 2,012.15, 3,018.62 and 713.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,012.15 : 3,018.62 = 713.72 : x
2. Step 2: Convert to fraction form
   2,012.15/3,018.62 = 713.72/x
3. Step 3: Cross multiply
   2,012.15x = 3,018.62 × 713.72
4. Step 4: Simplify right side
   2,012.15x = 2,154,436.16
5. Step 5: Solve for x
   x = 2,154,436.16/2,012.15
6. Step 6: Final answer
   x = 1,070.72