Finding the Fourth Proportional to 2,235.09, 3,085.49 and 1,438.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,235.09 : 3,085.49 = 1,438.86 : x
2. Step 2: Convert to fraction form
   2,235.09/3,085.49 = 1,438.86/x
3. Step 3: Cross multiply
   2,235.09x = 3,085.49 × 1,438.86
4. Step 4: Simplify right side
   2,235.09x = 4,439,603.31
5. Step 5: Solve for x
   x = 4,439,603.31/2,235.09
6. Step 6: Final answer
   x = 1,986.32