Finding the Fourth Proportional to 1,079.50, 1,489.71 and 613.84

Step by Step Solution

1. Step 1: Write the proportion equation
   1,079.50 : 1,489.71 = 613.84 : x
2. Step 2: Convert to fraction form
   1,079.50/1,489.71 = 613.84/x
3. Step 3: Cross multiply
   1,079.50x = 1,489.71 × 613.84
4. Step 4: Simplify right side
   1,079.50x = 914,443.59
5. Step 5: Solve for x
   x = 914,443.59/1,079.50
6. Step 6: Final answer
   x = 847.10