Finding the Fourth Proportional to 1,820.59, 2,728.59 and 779.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,820.59 : 2,728.59 = 779.37 : x
2. Step 2: Convert to fraction form
   1,820.59/2,728.59 = 779.37/x
3. Step 3: Cross multiply
   1,820.59x = 2,728.59 × 779.37
4. Step 4: Simplify right side
   1,820.59x = 2,126,581.19
5. Step 5: Solve for x
   x = 2,126,581.19/1,820.59
6. Step 6: Final answer
   x = 1,168.07