Finding the Fourth Proportional to 1,815.83, 2,723.28 and 775.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,815.83 : 2,723.28 = 775.31 : x
2. Step 2: Convert to fraction form
   1,815.83/2,723.28 = 775.31/x
3. Step 3: Cross multiply
   1,815.83x = 2,723.28 × 775.31
4. Step 4: Simplify right side
   1,815.83x = 2,111,386.22
5. Step 5: Solve for x
   x = 2,111,386.22/1,815.83
6. Step 6: Final answer
   x = 1,162.77