Finding the Fourth Proportional to 2,373.21, 3,274.96 and 1,311.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,373.21 : 3,274.96 = 1,311.05 : x
2. Step 2: Convert to fraction form
   2,373.21/3,274.96 = 1,311.05/x
3. Step 3: Cross multiply
   2,373.21x = 3,274.96 × 1,311.05
4. Step 4: Simplify right side
   2,373.21x = 4,293,636.31
5. Step 5: Solve for x
   x = 4,293,636.31/2,373.21
6. Step 6: Final answer
   x = 1,809.21