Finding the Fourth Proportional to 1,858.34, 2,787.62 and 818.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,858.34 : 2,787.62 = 818.83 : x
2. Step 2: Convert to fraction form
   1,858.34/2,787.62 = 818.83/x
3. Step 3: Cross multiply
   1,858.34x = 2,787.62 × 818.83
4. Step 4: Simplify right side
   1,858.34x = 2,282,575.82
5. Step 5: Solve for x
   x = 2,282,575.82/1,858.34
6. Step 6: Final answer
   x = 1,228.29