Finding the Fourth Proportional to 2,553.12, 3,523.48 and 1,505.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,553.12 : 3,523.48 = 1,505.78 : x
2. Step 2: Convert to fraction form
   2,553.12/3,523.48 = 1,505.78/x
3. Step 3: Cross multiply
   2,553.12x = 3,523.48 × 1,505.78
4. Step 4: Simplify right side
   2,553.12x = 5,305,585.71
5. Step 5: Solve for x
   x = 5,305,585.71/2,553.12
6. Step 6: Final answer
   x = 2,078.08