Finding the Fourth Proportional to 2,391.90, 3,586.89 and 1,236.06

Step by Step Solution

1. Step 1: Write the proportion equation
   2,391.90 : 3,586.89 = 1,236.06 : x
2. Step 2: Convert to fraction form
   2,391.90/3,586.89 = 1,236.06/x
3. Step 3: Cross multiply
   2,391.90x = 3,586.89 × 1,236.06
4. Step 4: Simplify right side
   2,391.90x = 4,433,611.25
5. Step 5: Solve for x
   x = 4,433,611.25/2,391.90
6. Step 6: Final answer
   x = 1,853.59