Finding the Fourth Proportional to 1,858.27, 2,786.83 and 818.07

Step by Step Solution

1. Step 1: Write the proportion equation
   1,858.27 : 2,786.83 = 818.07 : x
2. Step 2: Convert to fraction form
   1,858.27/2,786.83 = 818.07/x
3. Step 3: Cross multiply
   1,858.27x = 2,786.83 × 818.07
4. Step 4: Simplify right side
   1,858.27x = 2,279,835.34
5. Step 5: Solve for x
   x = 2,279,835.34/1,858.27
6. Step 6: Final answer
   x = 1,226.86