Finding the Fourth Proportional to 2,020.86, 2,790.18 and 1,235.43

Step by Step Solution

1. Step 1: Write the proportion equation
   2,020.86 : 2,790.18 = 1,235.43 : x
2. Step 2: Convert to fraction form
   2,020.86/2,790.18 = 1,235.43/x
3. Step 3: Cross multiply
   2,020.86x = 2,790.18 × 1,235.43
4. Step 4: Simplify right side
   2,020.86x = 3,447,072.08
5. Step 5: Solve for x
   x = 3,447,072.08/2,020.86
6. Step 6: Final answer
   x = 1,705.75