Finding the Fourth Proportional to 2,055.15, 2,835.93 and 1,215.81

Step by Step Solution

1. Step 1: Write the proportion equation
   2,055.15 : 2,835.93 = 1,215.81 : x
2. Step 2: Convert to fraction form
   2,055.15/2,835.93 = 1,215.81/x
3. Step 3: Cross multiply
   2,055.15x = 2,835.93 × 1,215.81
4. Step 4: Simplify right side
   2,055.15x = 3,447,952.05
5. Step 5: Solve for x
   x = 3,447,952.05/2,055.15
6. Step 6: Final answer
   x = 1,677.71