Finding the Fourth Proportional to 2,013.56, 3,020.78 and 715.04

Step by Step Solution

1. Step 1: Write the proportion equation
   2,013.56 : 3,020.78 = 715.04 : x
2. Step 2: Convert to fraction form
   2,013.56/3,020.78 = 715.04/x
3. Step 3: Cross multiply
   2,013.56x = 3,020.78 × 715.04
4. Step 4: Simplify right side
   2,013.56x = 2,159,978.53
5. Step 5: Solve for x
   x = 2,159,978.53/2,013.56
6. Step 6: Final answer
   x = 1,072.72