Finding the Fourth Proportional to 1,395.84, 1,924.66 and 1,311.08

Step by Step Solution

1. Step 1: Write the proportion equation
   1,395.84 : 1,924.66 = 1,311.08 : x
2. Step 2: Convert to fraction form
   1,395.84/1,924.66 = 1,311.08/x
3. Step 3: Cross multiply
   1,395.84x = 1,924.66 × 1,311.08
4. Step 4: Simplify right side
   1,395.84x = 2,523,383.23
5. Step 5: Solve for x
   x = 2,523,383.23/1,395.84
6. Step 6: Final answer
   x = 1,807.79