Finding the Fourth Proportional to 2,353.20, 3,528.63 and 1,053.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,353.20 : 3,528.63 = 1,053.78 : x
2. Step 2: Convert to fraction form
   2,353.20/3,528.63 = 1,053.78/x
3. Step 3: Cross multiply
   2,353.20x = 3,528.63 × 1,053.78
4. Step 4: Simplify right side
   2,353.20x = 3,718,399.72
5. Step 5: Solve for x
   x = 3,718,399.72/2,353.20
6. Step 6: Final answer
   x = 1,580.15