Finding the Fourth Proportional to 3,689.47, 5,091.39 and 2,010.89

Step by Step Solution

1. Step 1: Write the proportion equation
   3,689.47 : 5,091.39 = 2,010.89 : x
2. Step 2: Convert to fraction form
   3,689.47/5,091.39 = 2,010.89/x
3. Step 3: Cross multiply
   3,689.47x = 5,091.39 × 2,010.89
4. Step 4: Simplify right side
   3,689.47x = 10,238,199.78
5. Step 5: Solve for x
   x = 10,238,199.78/3,689.47
6. Step 6: Final answer
   x = 2,774.98