Finding the Fourth Proportional to 1,819.15, 2,729.18 and 723.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,819.15 : 2,729.18 = 723.15 : x
2. Step 2: Convert to fraction form
   1,819.15/2,729.18 = 723.15/x
3. Step 3: Cross multiply
   1,819.15x = 2,729.18 × 723.15
4. Step 4: Simplify right side
   1,819.15x = 1,973,606.52
5. Step 5: Solve for x
   x = 1,973,606.52/1,819.15
6. Step 6: Final answer
   x = 1,084.91