Finding the Fourth Proportional to 2,770.62, 4,158.15 and 1,290.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,770.62 : 4,158.15 = 1,290.52 : x
2. Step 2: Convert to fraction form
   2,770.62/4,158.15 = 1,290.52/x
3. Step 3: Cross multiply
   2,770.62x = 4,158.15 × 1,290.52
4. Step 4: Simplify right side
   2,770.62x = 5,366,172.06
5. Step 5: Solve for x
   x = 5,366,172.06/2,770.62
6. Step 6: Final answer
   x = 1,936.81