Finding the Fourth Proportional to 1,308.81, 1,804.83 and 910.95

Step by Step Solution

1. Step 1: Write the proportion equation
   1,308.81 : 1,804.83 = 910.95 : x
2. Step 2: Convert to fraction form
   1,308.81/1,804.83 = 910.95/x
3. Step 3: Cross multiply
   1,308.81x = 1,804.83 × 910.95
4. Step 4: Simplify right side
   1,308.81x = 1,644,109.89
5. Step 5: Solve for x
   x = 1,644,109.89/1,308.81
6. Step 6: Final answer
   x = 1,256.19