Finding the Fourth Proportional to 1,079.52, 1,489.72 and 613.84

Step by Step Solution

1. Step 1: Write the proportion equation
   1,079.52 : 1,489.72 = 613.84 : x
2. Step 2: Convert to fraction form
   1,079.52/1,489.72 = 613.84/x
3. Step 3: Cross multiply
   1,079.52x = 1,489.72 × 613.84
4. Step 4: Simplify right side
   1,079.52x = 914,449.72
5. Step 5: Solve for x
   x = 914,449.72/1,079.52
6. Step 6: Final answer
   x = 847.09