Finding the Fourth Proportional to 3,513.89, 5,271.90 and 2,109.87

Step by Step Solution

1. Step 1: Write the proportion equation
   3,513.89 : 5,271.90 = 2,109.87 : x
2. Step 2: Convert to fraction form
   3,513.89/5,271.90 = 2,109.87/x
3. Step 3: Cross multiply
   3,513.89x = 5,271.90 × 2,109.87
4. Step 4: Simplify right side
   3,513.89x = 11,123,023.65
5. Step 5: Solve for x
   x = 11,123,023.65/3,513.89
6. Step 6: Final answer
   x = 3,165.45