Finding the Fourth Proportional to 3,689.43, 5,091.30 and 2,010.90

Step by Step Solution

1. Step 1: Write the proportion equation
   3,689.43 : 5,091.30 = 2,010.90 : x
2. Step 2: Convert to fraction form
   3,689.43/5,091.30 = 2,010.90/x
3. Step 3: Cross multiply
   3,689.43x = 5,091.30 × 2,010.90
4. Step 4: Simplify right side
   3,689.43x = 10,238,095.17
5. Step 5: Solve for x
   x = 10,238,095.17/3,689.43
6. Step 6: Final answer
   x = 2,774.98