Finding the Fourth Proportional to 3,689.50, 5,091.33 and 2,010.90

Step by Step Solution

1. Step 1: Write the proportion equation
   3,689.50 : 5,091.33 = 2,010.90 : x
2. Step 2: Convert to fraction form
   3,689.50/5,091.33 = 2,010.90/x
3. Step 3: Cross multiply
   3,689.50x = 5,091.33 × 2,010.90
4. Step 4: Simplify right side
   3,689.50x = 10,238,145.44
5. Step 5: Solve for x
   x = 10,238,145.44/3,689.50
6. Step 6: Final answer
   x = 2,774.94