Finding the Fourth Proportional to 3,867.89, 5,337.70 and 2,099.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,867.89 : 5,337.70 = 2,099.50 : x
2. Step 2: Convert to fraction form
   3,867.89/5,337.70 = 2,099.50/x
3. Step 3: Cross multiply
   3,867.89x = 5,337.70 × 2,099.50
4. Step 4: Simplify right side
   3,867.89x = 11,206,477.31
5. Step 5: Solve for x
   x = 11,206,477.31/3,867.89
6. Step 6: Final answer
   x = 2,897.31