Finding the Fourth Proportional to 2,555.20, 3,525.17 and 1,435.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,555.20 : 3,525.17 = 1,435.88 : x
2. Step 2: Convert to fraction form
   2,555.20/3,525.17 = 1,435.88/x
3. Step 3: Cross multiply
   2,555.20x = 3,525.17 × 1,435.88
4. Step 4: Simplify right side
   2,555.20x = 5,061,710.98
5. Step 5: Solve for x
   x = 5,061,710.98/2,555.20
6. Step 6: Final answer
   x = 1,980.95