Finding the Fourth Proportional to 3,870.89, 5,341.83 and 2,102.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,870.89 : 5,341.83 = 2,102.50 : x
2. Step 2: Convert to fraction form
   3,870.89/5,341.83 = 2,102.50/x
3. Step 3: Cross multiply
   3,870.89x = 5,341.83 × 2,102.50
4. Step 4: Simplify right side
   3,870.89x = 11,231,197.58
5. Step 5: Solve for x
   x = 11,231,197.58/3,870.89
6. Step 6: Final answer
   x = 2,901.45