Finding the Fourth Proportional to 2,814.81, 4,215.87 and 1,355.06

Step by Step Solution

1. Step 1: Write the proportion equation
   2,814.81 : 4,215.87 = 1,355.06 : x
2. Step 2: Convert to fraction form
   2,814.81/4,215.87 = 1,355.06/x
3. Step 3: Cross multiply
   2,814.81x = 4,215.87 × 1,355.06
4. Step 4: Simplify right side
   2,814.81x = 5,712,735.72
5. Step 5: Solve for x
   x = 5,712,735.72/2,814.81
6. Step 6: Final answer
   x = 2,029.53