Finding the Fourth Proportional to 3,870.91, 5,341.90 and 2,102.56

Step by Step Solution

1. Step 1: Write the proportion equation
   3,870.91 : 5,341.90 = 2,102.56 : x
2. Step 2: Convert to fraction form
   3,870.91/5,341.90 = 2,102.56/x
3. Step 3: Cross multiply
   3,870.91x = 5,341.90 × 2,102.56
4. Step 4: Simplify right side
   3,870.91x = 11,231,650.60
5. Step 5: Solve for x
   x = 11,231,650.60/3,870.91
6. Step 6: Final answer
   x = 2,901.55