Finding the Fourth Proportional to 1,078.84, 1,488.82 and 613.08

Step by Step Solution

1. Step 1: Write the proportion equation
   1,078.84 : 1,488.82 = 613.08 : x
2. Step 2: Convert to fraction form
   1,078.84/1,488.82 = 613.08/x
3. Step 3: Cross multiply
   1,078.84x = 1,488.82 × 613.08
4. Step 4: Simplify right side
   1,078.84x = 912,765.77
5. Step 5: Solve for x
   x = 912,765.77/1,078.84
6. Step 6: Final answer
   x = 846.06