Finding the Fourth Proportional to 2,555.10, 3,526.20 and 1,420.83

Step by Step Solution

1. Step 1: Write the proportion equation
   2,555.10 : 3,526.20 = 1,420.83 : x
2. Step 2: Convert to fraction form
   2,555.10/3,526.20 = 1,420.83/x
3. Step 3: Cross multiply
   2,555.10x = 3,526.20 × 1,420.83
4. Step 4: Simplify right side
   2,555.10x = 5,010,130.75
5. Step 5: Solve for x
   x = 5,010,130.75/2,555.10
6. Step 6: Final answer
   x = 1,960.84