Finding the Fourth Proportional to 2,342.17, 3,231.12 and 1,643.95

Step by Step Solution

1. Step 1: Write the proportion equation
   2,342.17 : 3,231.12 = 1,643.95 : x
2. Step 2: Convert to fraction form
   2,342.17/3,231.12 = 1,643.95/x
3. Step 3: Cross multiply
   2,342.17x = 3,231.12 × 1,643.95
4. Step 4: Simplify right side
   2,342.17x = 5,311,799.72
5. Step 5: Solve for x
   x = 5,311,799.72/2,342.17
6. Step 6: Final answer
   x = 2,267.90