Finding the Fourth Proportional to 2,665.06, 3,673.83 and 1,720.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,665.06 : 3,673.83 = 1,720.78 : x
2. Step 2: Convert to fraction form
   2,665.06/3,673.83 = 1,720.78/x
3. Step 3: Cross multiply
   2,665.06x = 3,673.83 × 1,720.78
4. Step 4: Simplify right side
   2,665.06x = 6,321,853.19
5. Step 5: Solve for x
   x = 6,321,853.19/2,665.06
6. Step 6: Final answer
   x = 2,372.12