Finding the Fourth Proportional to 2,770.45, 4,158.49 and 1,384.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,770.45 : 4,158.49 = 1,384.78 : x
2. Step 2: Convert to fraction form
   2,770.45/4,158.49 = 1,384.78/x
3. Step 3: Cross multiply
   2,770.45x = 4,158.49 × 1,384.78
4. Step 4: Simplify right side
   2,770.45x = 5,758,593.78
5. Step 5: Solve for x
   x = 5,758,593.78/2,770.45
6. Step 6: Final answer
   x = 2,078.58