Finding the Fourth Proportional to 2,643.35, 3,961.78 and 1,485.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,643.35 : 3,961.78 = 1,485.59 : x
2. Step 2: Convert to fraction form
   2,643.35/3,961.78 = 1,485.59/x
3. Step 3: Cross multiply
   2,643.35x = 3,961.78 × 1,485.59
4. Step 4: Simplify right side
   2,643.35x = 5,885,557.23
5. Step 5: Solve for x
   x = 5,885,557.23/2,643.35
6. Step 6: Final answer
   x = 2,226.56