Finding the Fourth Proportional to 2,650.83, 3,976.19 and 1,420.65

Step by Step Solution

1. Step 1: Write the proportion equation
   2,650.83 : 3,976.19 = 1,420.65 : x
2. Step 2: Convert to fraction form
   2,650.83/3,976.19 = 1,420.65/x
3. Step 3: Cross multiply
   2,650.83x = 3,976.19 × 1,420.65
4. Step 4: Simplify right side
   2,650.83x = 5,648,767.22
5. Step 5: Solve for x
   x = 5,648,767.22/2,650.83
6. Step 6: Final answer
   x = 2,130.94