Finding the Fourth Proportional to 3,401.34, 5,102.82 and 1,321.40

Step by Step Solution

1. Step 1: Write the proportion equation
   3,401.34 : 5,102.82 = 1,321.40 : x
2. Step 2: Convert to fraction form
   3,401.34/5,102.82 = 1,321.40/x
3. Step 3: Cross multiply
   3,401.34x = 5,102.82 × 1,321.40
4. Step 4: Simplify right side
   3,401.34x = 6,742,840.83
5. Step 5: Solve for x
   x = 6,742,840.83/3,401.34
6. Step 6: Final answer
   x = 1,982.41