Finding the Fourth Proportional to 2,752.62, 4,128.89 and 1,290.74

Step by Step Solution

1. Step 1: Write the proportion equation
   2,752.62 : 4,128.89 = 1,290.74 : x
2. Step 2: Convert to fraction form
   2,752.62/4,128.89 = 1,290.74/x
3. Step 3: Cross multiply
   2,752.62x = 4,128.89 × 1,290.74
4. Step 4: Simplify right side
   2,752.62x = 5,329,303.64
5. Step 5: Solve for x
   x = 5,329,303.64/2,752.62
6. Step 6: Final answer
   x = 1,936.09