Finding the Fourth Proportional to 2,643.95, 3,967.28 and 1,345.41

Step by Step Solution

1. Step 1: Write the proportion equation
   2,643.95 : 3,967.28 = 1,345.41 : x
2. Step 2: Convert to fraction form
   2,643.95/3,967.28 = 1,345.41/x
3. Step 3: Cross multiply
   2,643.95x = 3,967.28 × 1,345.41
4. Step 4: Simplify right side
   2,643.95x = 5,337,611.46
5. Step 5: Solve for x
   x = 5,337,611.46/2,643.95
6. Step 6: Final answer
   x = 2,018.81