Finding the Fourth Proportional to 1,068.79, 1,601.82 and 824.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,068.79 : 1,601.82 = 824.80 : x
2. Step 2: Convert to fraction form
   1,068.79/1,601.82 = 824.80/x
3. Step 3: Cross multiply
   1,068.79x = 1,601.82 × 824.80
4. Step 4: Simplify right side
   1,068.79x = 1,321,181.14
5. Step 5: Solve for x
   x = 1,321,181.14/1,068.79
6. Step 6: Final answer
   x = 1,236.15