Finding the Fourth Proportional to 6,290.90, 9,436.49 and 2,288.15

Step by Step Solution

1. Step 1: Write the proportion equation
   6,290.90 : 9,436.49 = 2,288.15 : x
2. Step 2: Convert to fraction form
   6,290.90/9,436.49 = 2,288.15/x
3. Step 3: Cross multiply
   6,290.90x = 9,436.49 × 2,288.15
4. Step 4: Simplify right side
   6,290.90x = 21,592,093.15
5. Step 5: Solve for x
   x = 21,592,093.15/6,290.90
6. Step 6: Final answer
   x = 3,432.27