Finding the Fourth Proportional to 2,013.18, 3,019.80 and 714.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,013.18 : 3,019.80 = 714.78 : x
2. Step 2: Convert to fraction form
   2,013.18/3,019.80 = 714.78/x
3. Step 3: Cross multiply
   2,013.18x = 3,019.80 × 714.78
4. Step 4: Simplify right side
   2,013.18x = 2,158,492.64
5. Step 5: Solve for x
   x = 2,158,492.64/2,013.18
6. Step 6: Final answer
   x = 1,072.18