Finding the Fourth Proportional to 1,768.18, 2,438.71 and 1,236.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,768.18 : 2,438.71 = 1,236.89 : x
2. Step 2: Convert to fraction form
   1,768.18/2,438.71 = 1,236.89/x
3. Step 3: Cross multiply
   1,768.18x = 2,438.71 × 1,236.89
4. Step 4: Simplify right side
   1,768.18x = 3,016,400.73
5. Step 5: Solve for x
   x = 3,016,400.73/1,768.18
6. Step 6: Final answer
   x = 1,705.94