Finding the Fourth Proportional to 1,796.86, 2,691.69 and 821.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,796.86 : 2,691.69 = 821.62 : x
2. Step 2: Convert to fraction form
   1,796.86/2,691.69 = 821.62/x
3. Step 3: Cross multiply
   1,796.86x = 2,691.69 × 821.62
4. Step 4: Simplify right side
   1,796.86x = 2,211,546.34
5. Step 5: Solve for x
   x = 2,211,546.34/1,796.86
6. Step 6: Final answer
   x = 1,230.78