Finding the Fourth Proportional to 1,820.09, 2,729.72 and 724.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,820.09 : 2,729.72 = 724.16 : x
2. Step 2: Convert to fraction form
   1,820.09/2,729.72 = 724.16/x
3. Step 3: Cross multiply
   1,820.09x = 2,729.72 × 724.16
4. Step 4: Simplify right side
   1,820.09x = 1,976,736.77
5. Step 5: Solve for x
   x = 1,976,736.77/1,820.09
6. Step 6: Final answer
   x = 1,086.07