Finding the Fourth Proportional to 1,818.38, 2,728.69 and 722.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,818.38 : 2,728.69 = 722.59 : x
2. Step 2: Convert to fraction form
   1,818.38/2,728.69 = 722.59/x
3. Step 3: Cross multiply
   1,818.38x = 2,728.69 × 722.59
4. Step 4: Simplify right side
   1,818.38x = 1,971,715.48
5. Step 5: Solve for x
   x = 1,971,715.48/1,818.38
6. Step 6: Final answer
   x = 1,084.32