Finding the Fourth Proportional to 1,078.59, 1,618.68 and 801.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,078.59 : 1,618.68 = 801.58 : x
2. Step 2: Convert to fraction form
   1,078.59/1,618.68 = 801.58/x
3. Step 3: Cross multiply
   1,078.59x = 1,618.68 × 801.58
4. Step 4: Simplify right side
   1,078.59x = 1,297,493.42
5. Step 5: Solve for x
   x = 1,297,493.42/1,078.59
6. Step 6: Final answer
   x = 1,202.96