Finding the Fourth Proportional to 2,770.72, 4,146.28 and 1,731.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,770.72 : 4,146.28 = 1,731.20 : x
2. Step 2: Convert to fraction form
   2,770.72/4,146.28 = 1,731.20/x
3. Step 3: Cross multiply
   2,770.72x = 4,146.28 × 1,731.20
4. Step 4: Simplify right side
   2,770.72x = 7,178,039.94
5. Step 5: Solve for x
   x = 7,178,039.94/2,770.72
6. Step 6: Final answer
   x = 2,590.68