Finding the Fourth Proportional to 3,870.88, 5,341.81 and 2,102.51

Step by Step Solution

1. Step 1: Write the proportion equation
   3,870.88 : 5,341.81 = 2,102.51 : x
2. Step 2: Convert to fraction form
   3,870.88/5,341.81 = 2,102.51/x
3. Step 3: Cross multiply
   3,870.88x = 5,341.81 × 2,102.51
4. Step 4: Simplify right side
   3,870.88x = 11,231,208.94
5. Step 5: Solve for x
   x = 11,231,208.94/3,870.88
6. Step 6: Final answer
   x = 2,901.46