Finding the Fourth Proportional to 2,752.56, 4,128.80 and 903.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,752.56 : 4,128.80 = 903.69 : x
2. Step 2: Convert to fraction form
   2,752.56/4,128.80 = 903.69/x
3. Step 3: Cross multiply
   2,752.56x = 4,128.80 × 903.69
4. Step 4: Simplify right side
   2,752.56x = 3,731,150.75
5. Step 5: Solve for x
   x = 3,731,150.75/2,752.56
6. Step 6: Final answer
   x = 1,355.52