Finding the Fourth Proportional to 1,216.82, 1,678.52 and 844.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,216.82 : 1,678.52 = 844.12 : x
2. Step 2: Convert to fraction form
   1,216.82/1,678.52 = 844.12/x
3. Step 3: Cross multiply
   1,216.82x = 1,678.52 × 844.12
4. Step 4: Simplify right side
   1,216.82x = 1,416,876.51
5. Step 5: Solve for x
   x = 1,416,876.51/1,216.82
6. Step 6: Final answer
   x = 1,164.41