Finding the Fourth Proportional to 1,311.09, 1,799.82 and 1,298.79

Step by Step Solution

1. Step 1: Write the proportion equation
   1,311.09 : 1,799.82 = 1,298.79 : x
2. Step 2: Convert to fraction form
   1,311.09/1,799.82 = 1,298.79/x
3. Step 3: Cross multiply
   1,311.09x = 1,799.82 × 1,298.79
4. Step 4: Simplify right side
   1,311.09x = 2,337,588.22
5. Step 5: Solve for x
   x = 2,337,588.22/1,311.09
6. Step 6: Final answer
   x = 1,782.93